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首页> 外文期刊>Hydrological Processes >Effects of urbanization and stormwater control measures on streamflows in the vicinity of Clarksburg, Maryland, USA
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Effects of urbanization and stormwater control measures on streamflows in the vicinity of Clarksburg, Maryland, USA

机译：城市化与雨水控制措施对美国马里兰州克拉克堡附近流出的效果

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Understanding the efficacy of revised watershed management methods is important to mitigating the impacts of urbanization on streamflow. We evaluated the influence of land use change, primarily as urbanization, and stormwater control measures on the relationship between precipitation and stream discharge over an 8-year period for five catchments near Clarksburg, Montgomery County, Maryland, USA. A unit-hydrograph model based on a temporal transfer function was employed to account for and standardize temporal variation in rainfall pattern, and properly apportion rainfall to streamflow at different time lags. From these lagged relationships, we quantified a correction to the precipitation time series to achieve a hydrograph that showed good agreement between precipitation and discharge records. Positive corrections appeared to include precipitation events that were of limited areal extent and therefore not captured by our rain gages. Negative corrections were analysed for potential causal relationships. We used mixed-model statistical techniques to isolate different sources of variance as drivers that mediate the rainfall-runoff dynamic before and after management. Seasonal periodicity mediated rainfall-runoff relationships, and land uses (i.e. agriculture, natural lands, wetlands and stormwater control measures) were statistically significant predictors of precipitation apportionment to stream discharge. Our approach is one way to evaluate actual effectiveness of management efforts in the face of complicating circumstances and could be paired with cost data to understand economic efficiency or life cycle aspects of watershed management. Published 2015. This article is a U.S. Government work and is in the public domain in the USA.
机译：了解经修订的流域管理方法的功效对于减轻城市化对流流的影响很重要。我们评估了土地利用变化的影响，主要作为城市化，雨水对克拉克斯堡，蒙哥马利县，马里兰州，马里兰州，马里兰州的五个集水区的雨水和流释放之间的关系。基于时间转移函数的单位 - 水文编程模型被用来解释并标准降雨模式的时间变化，并在不同时间滞后时正确分配降雨。从这些滞后的关系中，我们量化了对降水时间序列的校正，以实现沉淀和排放记录之间的良好一致性的水文。积极矫正似乎包括受限区域范围的降水事件，因此未被我们的雨指令捕获。分析负面校正以获得潜在的因果关系。我们使用混合模型统计技术将不同的差异源区隔离为驾驶员在管理前后调解降雨径流动态的驱动器。季节性周期介导的降雨 - 径流关系，以及土地使用（即农业，自然土地，湿地和雨水控制措施）是统计上的降水分配预测因子，以排放流量。我们的方法是在面对复杂情况下评估管理努力实际有效性的一种方法，可以与成本数据配对，以了解流域管理的经济效率或生命周期方面。 2015年出版。本文是美国政府工作，并在美国的公共领域。

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