View source for Obtaining Data:Sample Values

== Overland Parameters ==


<br />
<table class="collapsible collapsed" style="border-top: thin solid black; border-bottom: thin solid black;" width="800px">
<tr><th>TABLE 17.17   Adjustment for the Erodibility Factor (K)</th></tr>					
<tr>
	<td>
	<ol>
	<li>For soils with high very fine sand content of greater than 15%					
	<ol>
		<li>For soil textures coarser than loam (represented by the shaded area in the nomograph), subtract 5% from the percentage of verv fine sand and add the difference to the silt content. The 5% remaining very tine sand should be added to the % total sand"	</li>
		<li>For soil textures finer than loam (represented by the areas outside of the shaded area in the nomograph), subtract 10% from the % very fine sand and add the differenct to the silt content.  The 10 % remaining very fine sand should be added to the % total sand.  </li>
		<li>Determine the K value from the nomograph using the corrected sand and silt contents  </li>
	</ol>
	</li>	
	<li>For soil conditions outside the ideal conditions used to develop the nomograph as follows:	
	<ol>
		<li>If organic matter content is different from 2%, add the correction values provided in the following table
		<br /><br />
		<table style="border-top: thin solid black; border-bottom: thin solid black; font: courier, monospace; text-align: center;">
			<tr>
				<th colspan=2> &nbsp; </th>
				<th colspan=4>Correction values when organic matter is<hr /></th> 
			</tr>
			<tr>
				<th>K value</th>
				<th>0%</th>
				<th>1%</th>
				<th>2%</th>
				<th>3%</th>
				<th>4%</th>
			</tr>
			<tr>
				<td colspan=6><hr border="black" /></td>
			</tr>
			<tr>
				<td style="text-align: left">Greater than 0.40</td>
				<td>+0.14</td>
				<td>+0.07</td>
				<td>0.00 </td>
				<td>-0.07 </td>
				<td>-0.14 </td>
			</tr>
			<tr>
				<td style="text-align: left">0.20-0.40 </td>
				<td>+0.10</td>
				<td>+0.05</td>
				<td>0.00 </td>
				<td>-0.05 </td>
				<td>-0.10 </td>
			</tr>
			<tr>
				<td style="text-align: left">Less than 0.20</td>
				<td>+0.06</td>
				<td>+0.03</td>
				<td>0.00</td>
				<td>-0.03</td>
				<td>-0.06</td> 
			</tr>
		</table>
		<br />
		</li>
		<li>if rock content greater than 15%. the following table is used to adjuSt the K values. Rock content is the amount of soil particles by volume greater than 2.0 mm.
		<br /><br />
		<table style="border-top: thin solid black; border-bottom: thin solid black; font: courier, monospace; text-align: center;">
			<tr>
				<th> &nbsp; </th>
				<th colspan=3>Correction values when rock content is about<hr /></th>
			</tr>
			<tr>
				<th style="text-align: left">K value</th>
				<th>15-35%</th>
				<th>35-60%</th>
				<th>60-75%</th>
			</tr>
			<tr>
				<td colspan=4><hr /></td>
			</tr>
			<tr>
				<td>0.10</td>
				<td>+0.06</td>
				<td>+0.05</td>
				<td>+0.02</td>
			</tr>
			<tr>
				<td>0.15</td>
				<td>+0.10</td>
				<td>+0.05</td>
				<td>+0.02</td>
			</tr>
			<tr>
				<td>0.17</td>
				<td>+0.10</td>
				<td>+0.05</td>
				<td>+0.02</td>
			</tr>
			<tr>
				<td>0.20</td>
				<td>+0.10</td>
				<td>+0.05</td>
				<td>+0.02</td>
			</tr>
			<tr>
				<td>0.24</td>
				<td>+0.15</td>
				<td>+0.10</td>
				<td>+0.05</td>
			</tr>
			<tr>
				<td>0.28</td>
				<td>+0.15</td>
				<td>+0.10</td>
				<td>+0.05</td>
			</tr>
			<tr>
				<td>0.32</td>
				<td>+0.17</td>
				<td>+0.10</td>
				<td>+0.05</td>
			</tr>
			<tr>
				<td>0.37</td>
				<td>+0.20</td>
				<td>+0.10</td>
				<td>+0.05</td>
			</tr>
			<tr>
				<td>0.43</td>
				<td>+0.24</td>
				<td>+0.15</td>
				<td>+O.1O</td>
			</tr>
			<tr>
				<td>0.49</td>
				<td>+0 28</td>
				<td>+0.15</td>
				<td>+0.10</td>
			</tr>
			<tr>
				<td>0.55</td>
				<td>+0.32</td>
				<td>+0.17</td>
				<td>+0.10</td>
			</tr>
			<tr>
				<td>0.64</td>
				<td>+0.37</td>
				<td>+0.20</td>
				<td>+0.15</td>
			</tr>
		</table>
		<br />
		</li>
		<li>if soil structures are disturbed the following corrections are added to the K values.
		<br /><br />
		<table style="border-top: thin solid black; border-bottom: thin solid black; font: courier, monospace; text-align: center;">
			<tr>
				<th>Soil structure</th>
				<th>Corrections</th>
			</tr>
			<tr>
				<td colspan=2><hr /></td>
			</tr>
			<tr>
				<td>Very fine granular</td>
				<td>-0.09<td>
			</tr>
			<tr>
				<td>Fine granular</td>
				<td>-0.06</td>
			</tr>
			<tr>
				<td>Moderate or coarse granular</td>
				<td>-0.03</td>
			</tr>
		</table>
		<br />
		</li>
		<li>K corrections for permeability are provided as follows:  
		<br /><br />
		<table style="border-bottom: thin solid black; border-top: thin solid black; font: courier, monospace; text-align: center;">
			<tr style="border-bottom: thin solid black">
				<th>Soil characteristics</th>
				<th>Corrections</th>
			</tr>
			<tr>
				<td colspan=2><hr /></td>
			</tr>
			<tr>
				<td>Compact soil or pH greater than 9.0</td>
				<td>+ 0.03</td>
			</tr>
			<tr>
				<td>Many medium or coarse pores</td>
				<td>-0.03</td>
			</tr>
		</table>
		</li>
	</li>
	</ol>
</ol>
</table>
Source:   From Goldman et al. (1986).
<br />


{| 
|- 
| 
{| class="center collapsible collapsed" style="border-bottom: thin solid black; border-top: thin solid black;" width="500px"
|- 
! colspan=3 | TABLE 17.18 &nbsp; Cropping Management Factor (C) Values for Various Types of Cover <hr />
|- 
! width="400px" | Type of cover !! width="50px" | C !! Reduction, %
|- 
| style="text-align: left;" | None (fallow ground) || 1.00 || 0
|- 
| style="text-align: left;" | Native Vegetation (undisturbed) || 0.01 || 99
|- 
| style="text-align: left;" | Temporary Seedings (90% stand)—after 60 days || 0.10 || 90
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; 90% cover, annual grasses, no mulch
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; Wood liber mulch, 0.75 ton/acre, with seed || 0.50 || 50
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; Ryegrass (perennial type) || 0.05 || 95
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; Ryegrass (annulus) || 0.10 || 90
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; Millet or Sudan Grass || 0.05 || 95
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; Small Grain || 0.05 || 95
|- 
| style="text-align: left;" | Permanent Seedings (90% stand)
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; First 60 days || 0.40 || 60
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; 60 to 365 days || 0.05 || 95
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; After 365 days || 0.01 || 99
|- 
| style="text-align: left;" | Sod (laid immediately) || 0.01 || 99
|- 
| style="text-align: left;" | Mulch (rate of application in tons/ac)
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; Hay at 0.5 ton/ac || 0.25 || 75
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; Hay at 1.0 ton/ac || 0.13 || 87
|- 
| style="text-align: left;" | Hay at 1.5 tons/ac || 0.07 || 93
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; Hay at 2.0 tons/ac || 0.02 || 98
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; Small Grain Straw at 2.00 tons/ac || 0.02 || 98
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; Straw at 1.5 tons/ac, tacked down (for slopes up to 2:1) || 0.20 || 80
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; Straw at 4.0 tons/ac, tacked down (for slopes up to 2:1) || 0.05 || 95
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; Wood Chips at 6.0 tons/ac || 0.06 || 94
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; Wood Cellulose at 1.75 tons/ac || 0.10 || 90
|- 
| style="text-align: left;" | &nbsp;&nbsp;&nbsp; Fiberglass at 0.5 ton/ac || 0.05 || 95
|- 
| style="text-align: left;" | Asphalt Emulsion (1250 gal/ac) || 0.02 || 98
|- 
| style="text-align: left;" | Excelsior mat, jute (for slopes up to 2:1) || 0.30 || 70
|}
Unit conversion: 1 ton/ac = 2.267 t/ha.
Sources:   From Wanielista, 1978 and Goldman et ai. (1986).
|}


{| class="collapsible collapsed" style="border-top: thin solid black; border-bottom: thin solid black;" 
|- 
! colspan=2 | TABLE 17.19 Cropping Management Factor (C)<br />for General Land Use <hr />
|- 
! style="text-align: left;" | General land use !! style="text-align: left;" | C
|- 
| Crop Land || 0.08
|- 
| Pasture Land || 0.01
|- 
| Forest Land || 0.005
|- 
| Urban Land || 0.01
|- 
| Other || 1.00
|} 
Source:   Wanielista (1978).


{| class="collapsible collapsed" style="border-bottom: thin solid black; border-top: thin solid black;" 
! colspan=2 | TABLE 17.22 Erosion Control Practice Factors for Construction Sites <hr />
|- 
! style="text-align: left;" | Surface condition !! style="text-align: left;" | P
|- 
| Compacted and smooth || 1.3
|- 
| Trackwalked along contour<sup>1</sup> || 1.2
|- 
| Trackwalked up and down slope<sup>2</sup> || 0.9
|- 
| Punched straw || 0.9
|- 
| Rough, irregular cut || 0.9
|- 
| Loose to 12-in (30-cm) depth || 0.8
|}
<sup>1</sup>Tread marks oriented up and down slope <br />
<sup>2</sup>Tread marks oriented parallel to contours. <br />
Source:   From Goldman et al. (1986)


{| 
|- 
| 
{| class="center thin collapsible collapsed"
|-
! colspan="3" width="400px" | Overland Roughness Table 
|- 
! Land Use or Cover !! Recommended n-Value !! Range
|- 
| style="text-align: left;" | Concrete or asphalt || 0.011<sup>a</sup> || 0.01-0.013<sup>a</sup>
|- 
| style="text-align: left;" | Developed/industrial || 0.0137<sup>b</sup> || -
|- 
| style="text-align: left;" | Bare sand || 0.01<sup>a</sup> || 0.010-0.016<sup>a</sup>
|- 
| style="text-align: left;" | Graveled surface || 0.02<sup>a</sup> || 0.012-0.03<sup>a</sup>
|- 
| style="text-align: left;" | Bare clay-loam (eroded) || 0.02<sup>a</sup> || 0.012-0.033<sup>a</sup>
|- 
| style="text-align: left;" | Gullied land || - || 0.320-0.357<sup>c</sup>
|- 
| style="text-align: left;" | Bare field - no residue || 0.05<sup>a</sup> || 0.006-0.16<sup>a</sup>
|- 
| style="text-align: left;" | Range (natural) || 0.13<sup>a</sup> || 0.01-0.32<sup>a</sup>
|- 
| style="text-align: left;" | Range (clipped) || 0.10<sup>a</sup> || 0.02-0.24<sup>a</sup>
|- 
| style="text-align: left;" | Grass and pasture || - || 0.05-0.15<sup>a</sup>
|- 
| style="text-align: left;" | Pasture || - || 0.235-271<sup>c</sup>
|- 
| style="text-align: left;" | Clover || - || 0.08-0.25<sup>a</sup>
|- 
| style="text-align: left;" | Small grain || - || 0.1 -0.4<sup>a</sup>
|- 
| style="text-align: left;" | Row crops || - || 0.07-0.2<sup>a</sup>
|- 
| style="text-align: left;" | Cotton/soy || - || 0.246-0.261<sup>c</sup>
|- 
| style="text-align: left;" | Grass (bluegrass sod) || 0.45<sup>a</sup> || 0.39-0.63<sup>a</sup>
|- 
| style="text-align: left;" | Short grass prairie || 0.15<sup>a</sup> || 0.10-0.203
|- 
| style="text-align: left;" | Dense grass || 0.24<sup>a</sup> || 0.17-0.30<sup>a</sup>
|- 
| style="text-align: left;" | Bermuda grass || 0.41<sup>a</sup> || 0.30-0.48<sup>a</sup>
|- 
| style="text-align: left;" | Forest || 0.192<sup>b</sup> || 0.184-198<sup>c</sup>
|- 
| style="text-align: left;" | Sparely vegetated || 0.150<sup>b</sup> || - 
|}
<sup>a</sup>Engman (1986), <sup>b</sup>Downer, <sup>c</sup>Senarath et al (2000)
|}


== Wetland Parameters ==


== Stream Parameters ==


{| class="thin collapsible collapsed" width="588px"
|+ Table 12.2.1 Variation of Manning's Roughness Coefficients n with Bed Type	
|- 
! width="250px" | Bed characteristics !! Reference Manning's roughness coefficient n
|- 
| colspan=2 | '''Sand:'''	
|- 
| Plane bed || align="center" | 0.011-0.020
|- 
| Ripple bed || align="center" | 0.018-0.035 
|- 
| Dune bed || align="center" | 0.020-0.035 
|- 
| Standing waves || align="center" | 0.014-0.025 
|- 
| Antidunes || align="center" | 0.015-0.035 
|- 
| Gravel and cobbles: || align="center" | 0.020-0.030
|- 
| Boulder || "Roughness varies greatly. Usually roughness increases<br />with decreasing flow depth, n can reach 0.1"
|- 
| Vegetation || "Roughness varies greatly with the changes of density, <br />height, flexibility of vegetation, and the relative ratio <br />between flow depth and vegetative elements"
|- 
| rowspan=2 | "Bermuda, Kentucky, Buffalo grasses" || Flow depth more than 5 times vegetation height<br />n between 0.03 and 0.06
|- 
| Flow depth the same or less than that of<br />vegetation height. 0.01-0.2
|- 
| Extremely dense vegetation || "Vegetation height above flow depth, n can exceed 1"
|- 
| colspan=2 | Natural sandy streams: 	
|- 
| Clean and straight || align="center" | 0.025-0.04 
|- 
| Winding and some weeds || align="center" | 0.03-0.05 
|- 
| Mountain streams with boulders || align="center" | 0.04-0.1 
|- 
| colspan=2 | align="center" | Floodplains:  	
|- 
| Short grass || align="center" | 0.02-0.04 
|- 
| High grass || align="center" | 0.03-0.05 
|- 
| Dense willow, brush, etc. || align="center" | 0.05-0.20 
|}


{| width="1000px"
|- 
| 
{| class="center collapsible collapsed" 
! colspan=8 | Table of Particle Classifications <hr />
|- 
! &nbsp; !! colspan=2 | Size, mm !! &mu;m !! Inches !! Tyler !! US. standard !! align="left" | Class
|- 
| colspan=8 | 
<hr> 
|- 
| align="left" colspan=8 | Boulders and cobbles: 
|- 
| &nbsp; || 4000-2000 || &nbsp; || &nbsp; || 160-80 || &nbsp; || &nbsp; || align="left" | Very large boulders
|- 
| &nbsp; || 2000-1000 || &nbsp; || &nbsp; || 80-40 || &nbsp; || &nbsp; || align="left" | Large boulders
|- 
| &nbsp; || 1000-500 || &nbsp; || &nbsp; || 40-20 || &nbsp; || &nbsp; || align="left" | Medium boulders
|- 
| &nbsp; || 500-250 || &nbsp; || &nbsp; || 20-10 || &nbsp; || &nbsp; || align="left" | Small boulders
|- 
| &nbsp; || 250-130 || &nbsp; || &nbsp; || 10-5 || &nbsp; || &nbsp; || align="left" | Large cobbles
|- 
| &nbsp; || 130-64 || &nbsp; || &nbsp; || 5-2.5 || &nbsp; || &nbsp; || align="left" | Small cobbles
|- 
| align="left" colspan=8 | Gravel:							
|- 
| &nbsp; || 64-32 || &nbsp; || &nbsp; || 2.5-1.3 || &nbsp; || &nbsp; || align="left" | Very coarse gravel
|- 
| &nbsp; || 32-16 || &nbsp; || &nbsp; || 1.3-0.6 || &nbsp; || &nbsp; || align="left" | Coarse gravel
|- 
| &nbsp; || 16-8 || &nbsp; || &nbsp; || 0.6-0.3 || 2 1/2 || &nbsp; || align="left" | Medium gravel
|- 
| &nbsp; || 8-4 || &nbsp; || &nbsp; || 0.3-0.16 || 5 || 5 || align="left" | Fine gravel
|- 
| &nbsp; || 4-2 || &nbsp; || &nbsp; || 0.16-0.08 || 9 || 10 || align="left" | Very fine gravel
|- 
| align="left" colspan=8 | Sand:							
|- 
| &nbsp; || 2-1 || 2.00-1.00 || 2000-1000 || &nbsp; || 16 || 18 || align="left" | Very coarse sand
|- 
| &nbsp; || 1-11/2 || 1.00-0.50 || 1000-500 || &nbsp; || 32 || 35 || align="left" | Coarse sand
|- 
| &nbsp; || 1/2-1/4 || 0.50-0.25 || 500-250 || &nbsp; || 60 || 60 || align="left" | Medium sand
|- 
| &nbsp; || 1/4-1/8 || 0.25-0.125 || 250-125 || &nbsp; || 115 || 120 || align="left" | Fine sand
|- 
| &nbsp; || 1/8-1/16 || 0.125-0.062 || 125-62 || &nbsp; || 250 || 230 || align="left" | Very fine sand
|- 
| align="left" colspan=8 | Silt:							
|- 
| &nbsp; || 1/16-1/32 || 0.062-0.031 || 62-31 || &nbsp; || &nbsp; || &nbsp; || align="left" | Coarse silt
|- 
| &nbsp; || 1/32-1/64 || 0.031-0.016 || 31-16 || &nbsp; || &nbsp; || &nbsp; || align="left" | Medium silt
|- 
| &nbsp; || 1/64-1/128 || 0.016-0.008 || 16-8 || &nbsp; || &nbsp; || &nbsp; || align="left" | Fine silt
|- 
| &nbsp; || 1/128-1/256 || 0.008-0.004 || 8-4 || &nbsp; || &nbsp; || &nbsp; || align="left" | Very fine silt
|- 
| align="left" colspan=8 | Clay:							
|- 
| &nbsp; || 1/256-1/512 || 0.004-0.0020 || 4-2 || &nbsp; || &nbsp; || &nbsp; || align="left" | Coarse clay
|- 
| &nbsp; || 1/512-1/1024 || 0.0020-0.0010 || 2-1 || &nbsp; || &nbsp; || &nbsp; || align="left" | Medium clay
|- 
| &nbsp; || 1/1024-1/2048 || 0.0010-0.0005 || 1-0.5 || &nbsp; || &nbsp; || &nbsp; || align="left" | Fine clay
|- 
| &nbsp; || 1/2048-1/4096 || 0.0005-0.00024 || 0.5-0.24 || &nbsp; || &nbsp; || &nbsp; || align="left" | Very fine clay 
|- 
| colspan=8 | 
<hr />
|}
Source: From Lane.<sup>78</sup>
|}


== Culvert & Weir Parameters ==


==Infiltration Parameters==


{| class="thin collapsible collapsed" width="515px"
|- 
! colspan=5 | RICHARDS_EQN_INFILTRATION_BROOKS Parameters
|- 
| Table Name || # Values || Parameter || Units || Typical Range
|- 
| rowspan=9 valign="center" | RICHARDS_EQN_INFILTRATION_BROOKS <br /><br />3 sets of values for each ID.<br />one set of values per line for each soil layer || rowspan=9 valign="center" | 9x3 || K<sub>s</sub> || cm/hr || 0.05 - 23.5
|- 
| e || none || 0.4 - 0.55
|- 
| &theta;<sub>r<sub> || none || 0.01 -0.1
|- 
| &theta;<sub>i</sub> || none || &theta;<sub>r</sub> - e
|- 
| &theta;<sub>wp</sub> || none || 0.03 - 0.25
|- 
| d || cm || NA
|- 
| &lambda; || none || 0.1 - 0.4
|- 
| &Psi;<sub>b</sub> || cm || 5.0 - 100.0
|- 
| &Delta;z || cm || 0.1 - 10.0
|}


{| class="thin collapsible collapsed" width="515px"
|- 
! colspan=5 | RICHARDS_EQN_INFILTRATION_HAVERCAMP Parameters
|- 
| Table Name || # Values || Parameter || Units || Range
|- 
| rowspan=11 valign="center" | RICHARDS_EQN_INFILTRATION_HAVERCAMP<br /><br />3 sets of values for each ID<br />One set of values per line for each soil layer || rowspan=11 valign="center" | 11 x 3 || K<sub>s</sub> || cm/hr || 0.05 - 23.5
|- 
| e || none || 0.4 - 0.55
|- 
| &theta;<sub>r<sub> || none || 0.01 -0.1
|- 
| &theta;<sub>i</sub> || none || &theta;<sub>r</sub> - e
|- 
| &theta;<sub>wp</sub> || none || 0.03 - 0.25
|- 
| d<sub>L</sub> || cm || NA
|- 
| &alpha; || none || fit to curve
|- 
| &Beta; || none || fit to curve
|- 
| A || none || fit to curve
|- 
| ''B'' || none || fit to curve
|- 
| &Delta;z || cm || 0.1 - 10.0
|}


==Evapotranspiration Parameters==


{| class="collapsible collapsed thin"
|- 
! colspan=2 | Table A.l: Albedos of shortwave radiation for assorted types of vegetation/land-cover types<sup>a</sup> 
|- 
! width="50%" | Ground Cover !! width="50%" | Albedo
|- 
| Snow || see Figures A.l and A.2
|- 
| Fresh snow || 0.75-0.95<sup>b</sup>, 0.70-0.95<sup>c</sup>, 0.80-0.95<sup>d</sup>, 0.95<sup>e</sup>
|- 
| Fresh snow (low density) || 0.85<sup>f</sup>
|- 
| Fresh snow (high density) || 0.65<sup>f</sup>
|- 
| Fresh dry snow || 0.80-0.95<sup>g</sup>
|- 
| Pure white snow || 0.60-0.70<sup>g</sup>
|- 
| Polluted snow || 0.40-0.50<sup>g</sup>
|- 
| Snow several days old || 0.40-0.70<sup>b</sup>, 0.70<sup>c</sup>, 0.42-0.70<sup>d</sup>, 0.40<sup>e</sup>
|- 
| Clean old snow || 0.55<sup>f</sup>
|- 
| Dirty old snow || 0.45<sup>f</sup>
|- 
| Clean glacier ice || 0.35<sup>f</sup>
|- 
| Dirty glacier ice || 0.25<sup>f</sup>
|- 
| Glacier || 0.20-0.40<sup>e</sup>
|- 
| Dark soil || 0.05-0.15<sup>b</sup>, 0.05-0.15<sup>g</sup>
|- 
| Dry clay or gray soil || 0.20-0.35<sup>b</sup>, 0.20-0.35<sup>g</sup>
|- 
| Dark organic soils || O.10<sup>f</sup>
|- 
| Dry black soil || 0.14<sup>i</sup>
|- 
| Moist black soil || 0.08<sup>i</sup>
|- 
| Dry gray soils || 0.25-0.30<sup>i</sup>
|- 
| Moist gray soils || 0.10-0.20<sup>g</sup>, 0.10-0.12<sup>i</sup>
|- 
| Dry blue loam || 0.23<sup>i</sup>
|- 
| Moist blue loam || 0.16<sup>i</sup>
|- 
| Desert loam || 0.29-0.31<sup>i</sup>
|- 
| Clay || 0.20<sup>f</sup>
|- 
| Dry clay soils || 0.20-0.35<sup>d</sup>
|- 
| Dry light sand || 0.25-0.45<sup>b</sup>
|- 
| Dry, light sandy soils || 0.25-0.45<sup>g</sup>
|- 
| Dry, sandy soils || 0.25-0.45<sup>d</sup>
|- 
| Light sandy soils || 0.35<sup>f</sup>
|- 
| Dry sand dune || 0.35-0.45<sup>b</sup>, 0.37<sup>c</sup>
|- 
| Wet sand dune || 0.20-0.30<sup>b</sup>, 0.24<sup>c</sup>
|- 
| Dry light sand, high sun || 0.35<sup>f</sup>
|- 
| Dry light sand, low sun || 0.60<sup>f</sup>
|- 
| Wet gray sand || 0.10<sup>f</sup>
|- 
| Dry gray sand || 0.20<sup>f</sup>
|- 
| Wet white sand || 0.25<sup>f</sup>
|- 
| Dry white sand || 0.35<sup>f</sup>
|- 
| Yellow sand || 0.35<sup>f</sup>
|- 
| White sand || 0.34-40<sup>i</sup>
|- 
| River sand || 0.43<sup>i</sup>
|- 
| Bright, fine sand || 0.37<sup>i</sup>
|- 
| Rock || 0.12-0.15<sup>i</sup>
|- 
| Peat soils || 0.05-0.15<sup>d</sup>
|- 
| Dry black coal spoil, high sun || 0.05<sup>f</sup>
|- 
| Dry concrete || 0.17-0.27<sup>b</sup>, 0.10-0.35<sup>e</sup>
|- 
| Road black top || 0.05-0.10<sup>b</sup>
|- 
| Ground Cover || Albedo
|- 
| Asphalt || 0.05-0.20<sup>e</sup>
|- 
| Tar and gravel || 0.08-0.18<sup>e</sup>
|- 
| Densely urbanized areas || 0.15-0.25<sup>i</sup>
|- 
| Urban area || 0.10-0.27 with an average of 0.15<sup>e</sup>
|- 
| Long grass (1.0 m) || 0.16<sup>e</sup>
|- 
| Short grass (2 cm) || 0.26<sup>e</sup>
|- 
| Wet dead grass || 0.20<sup>f</sup>
|- 
| Dry dead grass || 0.30<sup>f</sup>
|- 
| High, dense grass || 0.18-0.20<sup>i</sup>
|- 
| Green grass || 0.26<sup>i</sup>
|- 
| Grass dried in sun || 0.19<sup>i</sup>
|- 
| Typical fields || 0.20<sup>f</sup>
|- 
| Dry steppe || 0.25<sup>f</sup>, 0.20-0.30<sup>g</sup>
|- 
| Tundra and heather || 0.15<sup>f</sup>
|- 
| Tundra || 0.18-0.25<sup>e</sup>, 0.15-0.20<sup>g</sup>
|- 
| Heather || 0.10<sup>i</sup>
|- 
| Meadows || 0.15-0.25<sup>g</sup>
|- 
| Cereal and tobacco crops || 0.25<sup>f</sup>
|- 
| Cotton, potatoes and tomato crops || 0.20<sup>f</sup>
|- 
| Cotton || 0.20-0.22<sup>i</sup>
|- 
| Cotton plantations || 0.20-0.25<sup>g</sup>
|- 
| Potatoes || 0.19<sup>i</sup>
|- 
| Potato plantations || 0.15-0.25<sup>g</sup>
|- 
| Lettuce || 0.22<sup>i</sup>
|- 
| Beets || 0.18<sup>i</sup>
|- 
| Sugar cane || 0.15<sup>f</sup>
|- 
| Orchards || 0.15-0.20<sup>e</sup>
|- 
| Agricultural crops || 0.18-0.25<sup>e</sup>, 0.20-0.30<sup>d</sup>
|- 
| Rice field || 0.12<sup>i</sup>
|- 
| Rye and wheat fields || 0.10-0.25<sup>g</sup>
|- 
| Spring wheat || 0.10-0.25<sup>i</sup>
|- 
| Winter wheat || 0.16-0.23<sup>i</sup>
|- 
| Winter rye || 0.18-0.23<sup>i</sup>
|- 
| Deciduous forests - bare of leaves || 0.15<sup>e</sup>
|- 
| Deciduous forests - leaved || 0.20<sup>e</sup>
|- 
| Deciduous forests || 0.15-0.20<sup>g</sup>
|- 
| Deciduous forests - bare with snow on the ground || 0.20<sup>d</sup>
|- 
| Mixed hardwoods in leaf || 0.18<sup>f</sup>
|- 
| Rain forest || 0.15<sup>f</sup>
|- 
| Eucalyptus || 0.20<sup>f</sup>
|- 
| Forest - pine, fir, oak || 0.10-0.18<sup>c</sup>
|- 
| Forest - coniferous forests || 0.10-0.15<sup>g</sup>, 0.10-0.15<sup>d</sup>
|- 
| Forest - red pine forests || 0.10<sup>f</sup>
|- 
| Tops of oak || 0.18<sup>i</sup>
|- 
| Tops of pine || 0.14<sup>i</sup>
|- 
| Tops of fir || 0.10<sup>i</sup>
|- 
| Water || -0.0139 + 0.0467 tan Z, 1 &ge; A &ge; 0.03<sup>h</sup>
|- 
| Water || see Figure A.3
|}
NOTE:-  <sup>a</sup>The smaller value is for high zenith angles; larger value for low zenith angles.<br />From <sup>b</sup> Sellers (1965); <sup>c</sup> Munn (1966); <sup>d</sup> Rosenberg (1974); <sup>e</sup> Oke (1973); <sup>f</sup> Lee (1978); <sup>g</sup> de Jong (1973); <sup>h</sup> Atwater and Ball (1981); and, <sup>i</sup> Eagleson (1970).


{| 
|- 
| 
{| class="thin center collapsible collapsed" 
|- 
! colspan=2 width="500px" | Table A.2: Typical Extinction of Insolation by Grass<br />(adapted from Eagleson. 1970)
|- 
! width="50%" | Height of Grass (cm) !! width="50%" | K<sub>t</sub>
|- 
| 100 || 0.18
|-
| 50 || 0.18
|- 
| 10 || 0.68
|}
Source: Data from O.G. Sutton, "Micrometeorology," McGraw-Hill, New York, 1953.
|}


{| 
|- 
| 
{| class="center thin collapsible collapsed" 
|- 
! colspan=2 | Table A.3: Typical values of canopy resistance at noon
|- 
! width="50%" | Type of Vegetation || width="50%" | Canopy Resistance at Noon (s/m)
|- 
| Cotton field<sup>a</sup> || ~ 17
|- 
| Coniferous forest (Spruce)<sup>a</sup> || ~ 100
|- 
| Coniferous forest (Hemlock)<sup>a</sup> || ~ 150
|- 
| Coniferous forest (Pine, March)<sup>b</sup> || ~ 140
|- 
| Coniferous forest (Pine, June)<sup>b</sup> || ~ 120
|- 
| Coniferous forest (Pine, September/October)<sup>b</sup> || ~ 123
|- 
| Prairie grasslands (late July)<sup>c</sup> || ~ 100
|- 
| Prairie grasslands (mid September)<sup>c</sup> || -500
|- 
| Irrigated short grass crop<sup>d</sup> || -86
|- 
| Unirrigated barley<sup>d</sup> || -43
|}
from <sup>a</sup>Pielke (1984), <sup>b</sup>Gash and Stewart (1975), <sup>c</sup>Monteith (1975) and <sup>d</sup>Sceicz and Long (1969)
|}


{| width="600px"
|- 
| 
{| class="center thin collapsible collapsed" 
|- 
! colspan=2 | Table A.5: Sample values of vegetation height (Eagleson, 1970)
|- 
! width="50%" | Vegetation/Forest Types !! width="50%" | Sample Vegetation Height (cm)
|- 
| Mown Grass || 1.5-4.5
|- 
| Alfalfa || 20 - 40
|- 
| Long Grass || 60-70
|- 
| Maize || 90-300
|- 
| Sugar Cane || 100-400
|- 
| Brush || 135
|- 
| Orange Orchard || 350
|- 
| Pine forest || 500 - 2700
|- 
| Deciduous forest || 1700
|}
NOTE: The vegetation heights listed in Table A.3 are sample values only. Those values may not be the representative, expected vegetation height-values of those vegetation/forest types.
|}


{| class="collapsible collapsed" style="border-bottom: thin solid black; border-top: thin solid black;"
|+ TABLE D-2
|- 
! colspan=4 width="400"| Visible-Range Reflectance (albedo) of<br />Various Forms of Water and Various Earth Materials <hr />
|- 
! Surface !! colspan=2 | Conditions !! Albedo, a
|- 
| Clouds || Low overcast: || 100 m thick || 0.40
|- 
| &nbsp; || &nbsp; || 200 m thick || 0.50
|- 
| &nbsp; || &nbsp; || 500 m thick || 0.70
|- 
| Liquid water || Smooth;   solar angle: || 60° || 0.05
|- 
| &nbsp; || &nbsp; || 30° || 0.10
|- 
| &nbsp; || &nbsp; || 20° || 0.15
|- 
| &nbsp; || &nbsp; || 10° || 0.35
|- 
| &nbsp; || &nbsp; || 5° || 0.60
|- 
| &nbsp; || Wavy; solar angle: || 60° || 0.10
|- 
| Solid water || Fresh snow; || low density || 0.85
|- 
| &nbsp; || &nbsp; || high density || 0.65
|- 
| &nbsp; || Old snow; || clean || 0.55
|- 
| &nbsp; || &nbsp; || dirty || 0.45
|- 
| &nbsp; || Glacier ice; || clean || 0.35
|- 
| &nbsp; || &nbsp; || dirty || 0.25
|- 
| Sand || Dry, light; || high sun || 0.35
|- 
| &nbsp; || &nbsp; || low sun || 0.60
|- 
| &nbsp; || Gray; || wet || 0.10
|- 
| &nbsp; || &nbsp; || dry || 0.20
|- 
| &nbsp; || White; || wet || 0.25
|- 
| &nbsp; || &nbsp; || dry || 0.35
|-
| Soil || Organic; || dark || 0.10
|- 
| &nbsp; || Clay || &nbsp; || 0.20
|- 
| &nbsp; || Sandy; || light || 0.30
|- 
| Grass || Typical fields || &nbsp; || 0.20
|- 
| &nbsp; || Dead; || wet || 0.20
|- 
| &nbsp; || &nbsp; || dry || 0.30
|- 
| Tundra, heather || &nbsp; || &nbsp; || 0.15
|- 
| Crops || Cereals, tobacco || &nbsp; || 0.25
|- 
| &nbsp; || Cotton, potato, tomato || &nbsp; || 0.20
|- 
| &nbsp; || Sugar cane || &nbsp; || 0.15
|- 
| Trees || Rain forest || &nbsp; || 0.15
|- 
| &nbsp; || Eucalyptus || &nbsp; || 0.20
|- 
| &nbsp; || Red pine forest || &nbsp; || 0.10
|- 
| &nbsp; || Mixed hardwoods in leaf || &nbsp; || 0.18
|}
Data from Lee (1980).


==Groundwater Parameters==


{| width="1000px"
|- 
|
{| class="thin center collapsible collapsed" 
|- 
! colspan=12 | TABLE 12.1.2 Porosity and Specific Weight for Sediments
|- 
| align="left" | Classification and range<br />mm
| Fine sand<br />1/8-1/4 mm
| Fine sand<br />1/4-1/2 mm
| Medium sand<br />1/2-1 mm
| Coarse sand<br />1-2 mm
| Coarse sand<br />2-4 mm
| Gravelly sand<br />4-8 mm
| Fine gravel<br />8-16 mm
| Medium gravel<br />16-32 mm
| Coarse gravel<br />32-64 mm
| Coarse gravel<br />64-128 mm
| Coarse gravel<br />and boulders<br />128-256 mm
|- 
| align="left" | Porosity, % || 44 || 43 || 41 || 39 || 37.5 || 34.5 || 33 || 27 || 23 || 18 || 17
|- 
| align="left" | Specific weight<br />kN/m<sup>3</sup> || 14 || 15 || 15 || 16 || 16 || 17 || 18 || 19 || 20 || 22 || 22
|- 
| align="left" | Specific weight<br />lb f/ft<sup>3</sup> || 93 || 94 || 98 || 101 || 103 || 108 || 111 || 121 || 127 || 130 || 137
|}
|}


{| width="350px"
|- 
| 
{| class="thin collapsible collapsed" 
|- 
! colspan=2 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Table 6. Specific Storage <br />(Anderson & Woessner, 1992).	
|- 
! width="50%" | Material !! align=center width="50%" | Specific storage (S<sub>s</sub>)/(m) 
|- 
| Plastic Clay || align=center | 2.0E-02 to 2.6E-03 
|- 
| Stiff Clay || align=center | 2.6E-03 to 1.3E-03 
|- 
| Medium-hard clay || align=center | 1.3E-03 to 9.2E-04 
|- 
| Loose sand || align=center | 1.0E-03 to 4.9E-04 
|- 
| Dense sand || align=center | 2.0E-04 to 1.3E-04 
|- 
| Dense sandy gravel || align=center | 1.0E-04 to 4.9E-05 
|- 
| Rock, fissure, jointed || align=center | 6.9E-05 to 3.3E-06 
|- 
| Rock, sound || align=center | Less than 3.3e-6
|}
|}


{| width="575px"
|- 
| 
{| class="thin center collapsible collapsed" 
|- 
! align="left" colspan=5 | TABLE 6-1 Representative Values of Parameters in Equations (6-11) and (6-12) <br />Based on Analysis of 1845 Soils<sup>a</sup>
|- 
! width="150px" | Soil Texture !! width="100px" | &Phi; !! width="100px" |  K<sub>hsat</sub><br />(cm/s) !! width="100px" |  &#124;&Psi;<sub>s</sub>&#124;<br />(cm) !! width="100px" |  ''b''
|- 
| align="left" | Sand || 0.395 (0.056) || 1.76 x 10<sup>-2</sup> || 12.1 (14.3) || 4.05 (1.78)
|- 
| align="left" | Loamy sand || 0.410 (0.068) || 1.56 x 10<sup>-2</sup> || 9.0 (12.4) || 4.38 (1.47)
|- 
| align="left" | Sandy loam || 0.435 (0.086) || 3.47 x 10<sup>-3</sup> || 21.8 (31.0) || 4.90 (1.75)
|- 
| align="left" | Silt loarn || 0.485 (0.059) || 7.20 x 10<sup>-4</sup> || 78.6 (51.2) || 5.30 (1.96)
|- 
| align="left" | Loam || 0.451 (0.078) || 6.95 x 10<sup>-4</sup> || 47.8 (51.2) || 5.39 (1.87)
|- 
| align="left" | Sandy clay loam || 0.420 (0.059) || 6.30 x 10<sup>-4</sup> || 29.9 (37.8) || 7.12 (2.43)
|- 
| align="left" | Silty clay loam || 0.477 (0.057) || 1.70 x 10<sup>-4</sup> || 35.6 (37.8) || 7.75 (2.77)
|- 
| align="left" | Clay loam || 0.476 (0.053) || 2.45 x 10<sup>-4</sup> || 63.0 (51.0) || 8.52 (3.44)
|- 
| align="left" | Sandy clay || 0.426 (0.057) || 2.17 x 10<sup>-4</sup> || 15.3 (17.3) || 10.4 (1.64)
|- 
| align="left" | Silty clay || 0.492 (0.064) || 1.03 x 10<sup>-4</sup> || 49.0 (62.1) || 10.4  (4.45)
|- 
| align="left" | Clay || 0.482 (0.050) || 1.28 x 10<sup>-4</sup> || 40.5 (39.7) || 11.4 (3.70) 
|}
|- 
| 
<sup>a</sup> Values in parentheses are standard deviations. <br />Data from Clapp and Hornberger (1978).
|}


{| width="325px"
|- 
| 
{| class="thin center collapsible collapsed" width="350px"
|- 
! colspan="4" | Table 7. Specific Yield (Fetter, 1994).
|- 			
! style="text-align: left;" rowspan=2 width="175px" | Material !! colspan=3 | Specific Yield (S<sub>y</sub>)
|- 
| width="50px" | Min || width="50px" | Max || width="50px" | Average
|- 
| style="text-align: left;" | Clay || 0.00 || 0.05 || 0.02
|- 
| style="text-align: left;" | Sandy clay || 0.03 || 0.12 || 0.07
|- 
| style="text-align: left;" | Silt || 0.03 || 0.19 || 0.18
|- 
| style="text-align: left;" | Fine sand || 0.10 || 0.28 || 0.21
|- 
| style="text-align: left;" | Medium sand || 0.15 || 0.32 || 0.26
|- 
| style="text-align: left;" | Coarse sand || 0.20 || 0.35 || 0.27
|- 
| style="text-align: left;" | Gravelly sand || 0.20 || 0.35 || 0.25
|- 
| style="text-align: left;" | Fine gravel || 0.21 || 0.35 || 0.25
|- 
| style="text-align: left;" | Medium gravel || 0.13 || 0.26 || 0.23
|- 
| style="text-align: left;" | Coarse gravel || 0.12 || 0.26 || 0.22
|}
|}


{| 
|- 
| 
{| class="center thin collapsible collapsed" 
|- 
! colspan=9 width="550px"| Table 1. Rawls & Brakensiek soil parameter estimates.  
|- 
| (1)<br /><br />USDA<br />Textural<br />Classification
| (2)<br /><br /><br />Total<br />Porosity
| (3)<br /><br /><br />Effective<br />Porosity
| (4)<br /><br />Residual<br />Water<br />Content
| (5)<br />Wilting<br />Point<br />Water<br />Content
| (6)<br />Air<br />Entry<br />Pressure<br />(cm)
| (7)<br /><br />Pore<br />Distrib.<br />Index<br />
| (8)<br />Sat.<br />Hydr.<br />Conduct.<br />(cm/hr)
| (9)<br />G&A<br />Capillary<br />Head<br />(cm)
|- 
| style="text-align: left;" | Sand || 0.437 || 0.417 || 0.020 || 0.033 || 7.26 || 0.694 || 23.56 || 4.95
|- 
| style="text-align: left;" | Loamy sand || 0.437 || 0.401 || 0.035 || 0.055 || 8.69 || 0.553 || 5.98 || 6.13
|- 
| style="text-align: left;" | Sandy loam || 0.453 || 0.412 || 0.041 || 0.095 || 14.66 || 0.378 || 2.18 || 11.01
|- 
| style="text-align: left;" | Loam || 0.463 || 0.434 || 0.027 || 0.117 || 11.15 || 0.252 || 1.32 || 8.89
|- 
| style="text-align: left;" | Silt loam || 0.501 || 0.486 || 0.015 || 0.133 || 20.79 || 0.234 || 0.68 || 16.68
|- 
| style="text-align: left;" | Sandy clay loam || 0.398 || 0.330 || 0.068 || 0.148 || 28.08 || 0.319 || 0.30 || 21.85
|- 
| style="text-align: left;" | Clay loam || 0.464 || 0.390 || 0.075 || 0.197 || 25.89 || 0.242 || 0.20 || 20.88
|- 
| style="text-align: left;" | Silty clay loam || 0.471 || 0.432 || 0.040 || 0.208 || 32.56 || 0.177 || 0.20 || 27.30
|- 
| style="text-align: left;" | Sandy clay || 0.430 || 0.321 || 0.109 || 0.23'9 || 29.17 || 0.223 || 0.12 || 23.90
|- 
| style="text-align: left;" | Silty clay || 0.479 || 0.423 || 0.056 || 0.250 || 34.19 || 0.150 || 0.10 || 29.22
|- 
| style="text-align: left;" | Clay || 0.475 || 0.385 || 0.090 || 0.272 || 37.30 || 0.165 || 0.06 || 31.63
|}
|}

<br><br>
[http://hrsl.ba.ars.usda.gov/soilwater/Index.htm USDA Soil Properties Calculator]
<br>
=== [http://en.wikipedia.org/wiki/Field_capacity Field Capacity] ===


{| class="thin collapsible collapsed" width="400px" 
|- 
! colspan="4" | Field Capacity
|- 
! Texture Class !! -1 SD !! MEAN !! +1 SD
|- 
| Sand || 0.018 || 0.091 || 0.164
|- 
| Loamy Sand || 0.060 || 0.125 || 0.190
|-
| Sandy Loam || 0.126 || 0.207 || 0.288
|-
| Loam || 0.195 || 0.270 || 0.345
|-
| Silt Loam || 0.258 || 0.330 || 0.402
|-
| Sandy Clay Loam || 0.186 || 0.255 || 0.324
|-
| Clay Loam || 0.250 || 0.318 || 0.386
|-
| Silty Clay Loam || 0.304 || 0.366 || 0.428
|-
| Sandy Clay || 0.245 || 0.339 || 0.433
|-
| Silty Clay || 0.332 || 0.387 || 0.442
|-
| Clay || 0.326 || 0.396 || 0.466
|}
From:
Handbook of Hydrology, Maidment

which reproduces it from Rawls & Brakensiek, "prediction of soil water properties for hydrologic modeling", Watershed Management in the Eighties, ASCE


===Specific Gravity===


{| class="collapsible collapsed" cellspacing=0 cellpadding=0
|- 
! colspan=2 | Table 2.4 Specific Gravity of Common Minerals	<hr />
|- 
! Mineral !! Specific gravity, G<sub>s</sub>
|- 
| colspan=2 |
<hr />
|- 
| 
&nbsp;&nbsp;&nbsp;&nbsp; Quartz 
| 
&nbsp;&nbsp;&nbsp;&nbsp; 2.65
|- 
| 
&nbsp;&nbsp;&nbsp;&nbsp; Kaolinite 
| 
&nbsp;&nbsp;&nbsp;&nbsp; 2.6
|- 
| 
&nbsp;&nbsp;&nbsp;&nbsp; Illite 
| 
&nbsp;&nbsp;&nbsp;&nbsp; 2.8
|- 
| 
&nbsp;&nbsp;&nbsp;&nbsp; Montmorillonite 
| 
&nbsp;&nbsp;&nbsp;&nbsp; 2.65-2.80
|- 
| 
&nbsp;&nbsp;&nbsp;&nbsp; Halloysite 
| 
&nbsp;&nbsp;&nbsp;&nbsp; 2.0-2.55
|- 
| 
&nbsp;&nbsp;&nbsp;&nbsp; Potassium feldspar 
| 
&nbsp;&nbsp;&nbsp;&nbsp; 2.57
|- 
| 
&nbsp;&nbsp;&nbsp;&nbsp; Sodium and calcium feldspar 
| 
&nbsp;&nbsp;&nbsp;&nbsp; 2.62-2.76
|- 
| 
&nbsp;&nbsp;&nbsp;&nbsp; Chlorite 
| 
&nbsp;&nbsp;&nbsp;&nbsp; 2.6-2.9
|- 
| 
&nbsp;&nbsp;&nbsp;&nbsp; Biotite 
| 
&nbsp;&nbsp;&nbsp;&nbsp; 2.8-3.2
|- 
| 
&nbsp;&nbsp;&nbsp;&nbsp; Muscovite 
| 
&nbsp;&nbsp;&nbsp;&nbsp; 2.76-3.1
|- 
| 
&nbsp;&nbsp;&nbsp;&nbsp; Hornblende 
| 
&nbsp;&nbsp;&nbsp;&nbsp; 3.0-3.47
|- 
| 
&nbsp;&nbsp;&nbsp;&nbsp; Limonite 
| 
&nbsp;&nbsp;&nbsp;&nbsp; 3.6-4.0
|- 
| 
&nbsp;&nbsp;&nbsp;&nbsp; Olivine 
| 
&nbsp;&nbsp;&nbsp;&nbsp; 3.27-3.7 
|- 
| colspan=2 | 
<hr />
|}


===Weirs===


{| 
|- 
| 
{| class="thin center collapsible collapsed" style="font-family: times;"
|- 
! colspan="14" align="left" | Table 48.  Values of C in the Formula Q = CLH<sup>3/2</sup> for Models of Broad-crested Weirs with Rounded Upstream Corner 
|- 
! rowspan="2" | Name of<br />Experimenter 
! rowspan="2" width="30px" | [[Image:Samp_Val_Image_1.png]] 
! rowspan="2" width="30px" | [[Image:Samp_Val_Image_2.png]] 
! rowspan="2" width="30px" | [[Image:Samp_Val_Image_3.png]] 
! colspan="10" | Head in feet, H									
|- 
| width="25px" | 0.4 || width="25px" | 0.6 || width="25px" | 0.8 || width="25px" | 1.0 || width="25px" | 1.5 || width="25px" | 2.0 || width="25px" | 2.5 || width="25px" | 3.0 || width="25px" | 4.0 || width="25px" | 5.0				
|- 
| Bazin || 0.33 || 2.62 || 2.46 || 2.93 || 2.97 || 2.98 || 3.01 || 3.04 || &nbsp; || &nbsp; || &nbsp; || &nbsp; || &nbsp;
|- 
| Bazin || 0.33 || 6.56 || 2.46 || 2.70 || 2.82 || 2.87 || 2.89 || 2.92 || &nbsp; || &nbsp; || &nbsp; || &nbsp; || &nbsp;
|- 
| U.S. Deep Waterways || 0.33 || 2.52 || 4.57 || &nbsp; || 2.77 || 2.8 || 2.83 || 2.92 || 3 || 3.08 || 3.17 || 3.34 || 3.5
|- 
| U.S. Deep Waterways || 1.33 || 6.56 || 4.56 || &nbsp; || &nbsp; || 2.83 || 2.83 || 2.83 || 2.82 || 2.82 || 2.82 || 2.82 || 2.81
|}
|}


{| 
|- 
| 
{| class="center thin collapsible collapsed" style="font-family: times;"
|- 
! colspan="9" | Table 49.  Values of C in the Formula Q = CLH3/2 for Broad-Crested Weirs with Crests Inclined Slightly Downward 
|- 
! rowspan="2" | Slope of Crest 
! rowspan="2" | Length<br />of weir<br />in feet 
! colspan="7" | Head in feet, H 
|- 
| 0.1 || 0.2 || 0.3 || 0.4 || 0.5 || 0.6 || 0.7		
|- 
| 12 to 1 || 3.0 || 2.58 || 2.87 || 2.57 || 2.60 || 2.84 || 2.81 || 2.70
|- 
| 18 to 1 || 3.0 || 2.91 || 2.92 || 2.53 || 2.60 || 2.80 || 2.74 || 2.62
|- 
| 18 to 1 || 10.0 || 2.52 || 2.68 || 2.73 || 2.80 || 2.90 || 2.80 || 2.68
|}
|}


{| 
|- 
| 
{| class="center thin collapsible collapsed" style="font-family: times;" 
|- 
! colspan="13" | Table 50.  Values of C in the Formula Q = CLH<sup>3/2</sup> for weirs of Triangular Cross Section with Vertical Upstream Face and Sloping Downstream Face 
|- 
! rowspan="2" | Slope of<br />down-<br />stream<br />face
! rowspan="2" | Height<br />of weir<br />in feet,<br />P 
! colspan="11" | Head in feet, H 
|- 
| 0.2 || 0.3 || 0.4 || 0.5 || 0.6 || 0.7 || 0.8 || 0.9 || 1.0 || 1.2 || 1.5		
|- 
| Hor. Vert. || &nbsp; || &nbsp; || &nbsp; || &nbsp; || &nbsp; || &nbsp; || &nbsp; || &nbsp; || &nbsp; || &nbsp; || &nbsp; || &nbsp;
|- 
| 1 to 1 || 2.46 || 3.88 || 3.85 || 3.85 || 3.85 || 3.85 || 3.85 || 3.85 || 3.85 || 3.85 || 3.85 || 3.85
|- 
| 2 to 1 || 2.46 || 3.48 || 3.48 || 3.49 || 3.49 || 3.5 || 3.5 || 3.5 || 3.5 || 3.5 || 3.51 || 3.51
|- 
| 2 to 1 || 1.64 || 3.56 || 3.47 || 3.47 || 3.51 || 3.54 || 3.57 || 3.58 || 3.58 || 3.58 || 3.59 || 3.57
|- 
| 3 to 1 || 1.64 || &nbsp; || 2.9 || 3.11 || 3.22 || 3.26 || 3.33 || 3.37 || 3.4 || 3.4 || 3.41 || 3.41
|- 
| 5 to 1 || 2.46 || &nbsp; || 3.08 || 3.06 || 3.05 || 3.05 || 3.07 || 3.09 || 3.12 || 3.13 || 3.13 || 3.18
|- 
| 10 to 1 || 2.46 || &nbsp; || 2.82 || 2.83 || 2.84 || 2.86 || 2.89 || 2.9 || 2.91 || 2.91 || 2.92 || 2.93
|}
|}