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HEC-HMS Technical Reference Manual > Meteorology > Shortwave Radiation

Shortwave Radiation Basic Concepts

on the time of the year. 3-s2.0-B9780123972705000029-f02-25-9780123972705.jpg The extraterrestrial radiation …

HEC-HMS Technical Reference Manual > Primer on Models

Model Classification

on the mechanics of the model: how it deals with time, how it addresses randomness, and so on. While knowledge … to develop a relationship for travel time and …

HEC-HMS Technical Reference Manual > Evaporation and Transpiration

Priestley Taylor Method

as a meteorologic boundary condition. Net radiation should be computed, entered in the program as a radiation time …

HEC-HMS Technical Reference Manual > Erosion and Sediment Transport (Under Construction) > Reservoir Sediment Methods

Chen Sediment Trap

in the pond just before they exit. This critical settling velocity depends on the water depth (d) and the time …

HEC-HMS Technical Reference Manual > Meteorology > Shortwave Radiation

Reduced Solar Constant

of radiation. By the time rays have travelled down to the earth's surface, the magnitude of solar radiation from the top …

HEC-HMS Technical Reference Manual > Evaporation and Transpiration

Hargreaves Method

in potential evapotranspiration for simulation time steps less than 24 hours. Potential evapotranspiration ETo is computed …

HEC-HMS Technical Reference Manual > Erosion and Sediment Transport (Under Construction) > Erosion Methods

2D Sediment Transport

indicating time step …

HEC-HMS Technical Reference Manual > Evaporation and Transpiration

Penman Monteith Method

to the soil, or root zone. The mass transfer method is better suited for estimating ET over long time periods (on the order …

HEC-HMS Technical Reference Manual > Modeling Reservoirs > Reservoir Routing Concepts and Equations

Additional Release

Release method. The modeler can specify the additional releases based on a gage reading (time series of discharge …

HEC-HMS Technical Reference Manual > Transform

User-Specified Unit Hydrograph

Basic Concepts and Equations The user-specified unit hydrograph method uses a defined time vs. discharge curve to route excess precipitation to the subbasin ou …

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