Effects of urbanization and stormwater control measures on streamflows in the vicinity of Clarksburg, Maryland, USA

摘要: Understanding the efficacy of revised watershed management methods is important to mitigating impacts urbanization on streamflow. We evaluated influence land use change, primarily as urbanization, and stormwater control measures relationship between precipitation stream discharge over an 8-year period for five catchments near Clarksburg, Montgomery County, Maryland, USA. A unit-hydrograph model based a temporal transfer function was employed account standardize variation in rainfall pattern, properly apportion streamflow at different time lags. From these lagged relationships, we quantified correction series achieve hydrograph that showed good agreement records. Positive corrections appeared include events were limited areal extent therefore not captured by our rain gages. Negative analysed potential causal relationships. used mixed-model statistical techniques isolate sources variance drivers mediate rainfall–runoff dynamic before after management. Seasonal periodicity mediated uses (i.e. agriculture, natural lands, wetlands measures) statistically significant predictors apportionment discharge. Our approach one way evaluate actual effectiveness efforts face complicating circumstances could be paired with cost data understand economic efficiency or life cycle aspects Published 2015. This article U.S. Government work public domain