Abstract
AbstractThis paper establishes a novel approach to estimate monthly and annual direct runoff by combining the curve number method of the Natural Resources Conservation Service with an exponential d...
Highlights
Changes to the landscape affect many hydrologic processes and ecosystem services (Daily 1997; National Research Council 2004; Martin-Ortega et al 2015)
The Natural Resources Conservation Service (NRCS) curve number method estimates the direct runoff that results from an individual rainfall event as a function of land cover and soil characteristics (Natural Resources Conservation Service 2004a,b)
Both across watersheds and for each individual watershed, this study evaluated the performance of the new monthly and annual approaches by assessing 1) the mean error in monthly and annual runoff relative to observations, 2) the difference in squared errors of monthly and annual runoff between the new approach and the application of the curve number method to daily rainfall, and
Summary
Changes to the landscape affect many hydrologic processes and ecosystem services (Daily 1997; National Research Council 2004; Martin-Ortega et al 2015). Estimates of those effects, even when uncertain, benefit land-management decisions. Other contexts may tolerate greater uncertainty in order to reduce the time and resources required; these include land-management decisions in ungaged and data-poor locales, or rapid assessments across many ecologic and hydrologic processes that may be followed up by more detailed studies. Comparison of global precipitation estimates across a range of temporal and spatial scales, Journal of Climate, doi:10.1175/JCLI-D-15-0618.1
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