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Drainage Design Manual, Hydrology - Flood Control District of ...

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<strong>Drainage</strong> <strong>Design</strong> <strong>Manual</strong> for Maricopa County<br />

<strong>Hydrology</strong>: Application<br />

Table 9.7<br />

SUMMARY OF SOILS CHARACTERISTICS FOR EACH SUBBASIN<br />

XKSAT Natural<br />

Subbasin NRCS Soil DDMSW Area VC Bare Ground Adjusted RTIMP<br />

ID Map Unit Soil ID acres sq. mi. % in/hr in/hr %<br />

S10 10 64510 0.4 0.0007 0.94 0<br />

S10 51 64551 47.9 0.0748 0.24 0<br />

S10 52 64552 2.1 0.0033 0.16 20<br />

S10 72 64572 106.3 0.1661 0.09 30<br />

S10 93 64593 3.0 0.0046 0.33 0<br />

S10 95 64595 5.4 0.0085 0.04 0<br />

S10 103 645103 16.0 0.0251 0.1 65<br />

S10 104 645104 103.1 0.161 0.14 60<br />

Totals and Area-Weighted Values: 284.2 0.4441 49 0.13 0.19 37<br />

S11 10 64510 69.3 0.1083 0.94 0<br />

S11 45 64545 1.7 0.0027 0.03 0<br />

S11 51 64551 908.9 1.4201 0.24 0<br />

S11 52 64552 181.5 0.2836 0.16 20<br />

S11 103 645103 3.5 0.0054 0.1 65<br />

Totals and Area-Weighted Values: 1164.9 1.8201 30 0.24 0.29 3<br />

Land Use<br />

Code<br />

(1)<br />

Land Use<br />

ID<br />

(2)<br />

Table 9.8<br />

RAINFALL LOSS CHARACTERISTICS FOR EACH LAND USE<br />

Description<br />

(3)<br />

IA<br />

inches<br />

(4)<br />

RTIMP<br />

%<br />

(5)<br />

Effective<br />

Vegetation<br />

Cover 2<br />

%<br />

(6)<br />

220 C1 Commercial - light 0.10 80 15<br />

200 C2 Commercial - general 0.10 80 15<br />

130 LDR Low density residential 0.30 15 43<br />

140 MDR Medium density residential 0.25 30 35<br />

NHS NHS Hillslopes, Sonoran Desert 1 0.00 0 0<br />

110 VLDR Very low density residential 0.30 5 29<br />

Notes:<br />

1 The NHS land use classification is representative <strong>of</strong> all natural conditions in the<br />

watershed. Rainfall loss parameters for these areas are accounted for under the<br />

soil map units.<br />

2 Effective vegetation cover is the average vegetation cover for the land use area,<br />

including the impervious area.<br />

9-38 August 15, 2013

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