Constituents'' annual load estimation from highways

M. Kayhanian, S. Ha & M. K. Stenstrom
Constituents\342\200\231 Annual Loads Estimation (CALE) is a program to estimate annual stormwater runoff constituent loads from highways and their shoulders. It uses Visual Basic for Applications, which is included with ArcGIS Desktop (ESRI, Redlands, CA). The program is based on the rational method and Event Mean Concentrations (EMCs), which has become a popular method of estimating constituent loads. The program uses several data sources which are spatially referenced by incorporation into Geographical Information System (GIS)...
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