Factors Affecting Stream Nutrient Loads: A Synthesis of Regional SPARROW Model Results for the Continental United States [0.03%]
影响河流营养物质负荷的因素：美国大陆SPARROW模型结果的综合分析
Stephen D Preston,Richard B Alexander,Gregory E Schwarz et al.
Stephen D Preston et al.
We compared the results of 12 recently calibrated regional SPARROW (SPAtially Referenced Regressions On Watershed attributes) models covering most of the continental United States to evaluate the consistency and regional differences in fact...
Sparrow Modeling to Understand Water-Quality Conditions in Major Regions of the United States: A Featured Collection Introduction [0.03%]
美国主要区域水质状况的燕雀模型分析：特刊介绍
Stephen D Preston,Richard B Alexander,David M Wolock
Stephen D Preston
The Impacts of Water Conservation Strategies on Water Use: Four Case Studies [0.03%]
四项案例研究中的节水措施对用水行为的影响分析
Yushiou Tsai,Sara Cohen,Richard M Vogel
Yushiou Tsai
We assessed impacts on water use achieved by implementation of controlled experiments relating to four water conservation strategies in four towns within the Ipswich watershed in Massachusetts. The strategies included (1) installation of we...
Modeling the Potential Impact of Seasonal and Inactive Multi-Aquifer Wells on Contaminant Movement to Public Water-Supply Wells [0.03%]
季节性和非活跃多含水层井对公共供水井中污染物运移的潜在影响模型研究
Rl Johnson,Br Clark,Mk Landon et al.
Rl Johnson et al.
Wells screened across multiple aquifers can provide pathways for the movement of surprisingly large volumes of groundwater to confined aquifers used for public water supply (PWS). Using a simple numerical model, we examine the impact of sev...
Trends in Pesticide Concentrations in Streams of the Western United States, 1993-2005 [0.03%]
美国西部河流中农药浓度的时空变化趋势（1993～2005年）
Henry M Johnson,Joseph L Domagalski,Dina K Saleh
Henry M Johnson
Trends in pesticide concentrations for 15 streams in California, Oregon, Washington, and Idaho were determined for the organophosphate insecticides chlorpyrifos and diazinon and the herbicides atrazine, s-ethyl diproplythiocarbamate (EPTC),...
Weighted Regressions on Time, Discharge, and Season (WRTDS), with an Application to Chesapeake Bay River Inputs [0.03%]
基于时间、径流和季节的加权回归方法（WRTDS）及其在切萨皮克湾河流输入的应用研究
Robert M Hirsch,Douglas L Moyer,Stacey A Archfield
Robert M Hirsch
A new approach to the analysis of long-term surface water-quality data is proposed and implemented. The goal of this approach is to increase the amount of information that is extracted from the types of rich water-quality datasets that now ...
Influence of Environmental Factors on Biotic Responses to Nutrient Enrichment in Agricultural Streams [0.03%]
环境因素对农业溪流营养物质富集生物响应的影响
Terry R Maret,Christopher P Konrad,Andrew W Tranmer
Terry R Maret
The influence of environmental factors on biotic responses to nutrients was examined in three diverse agricultural regions of the United States. Seventy wadeable sites were selected along an agricultural land use gradient while minimizing n...
Incorporating Uncertainty Into the Ranking of SPARROW Model Nutrient Yields From Mississippi/Atchafalaya River Basin Watersheds [0.03%]
考虑SPARROW模型不确定性的密西西比河/阿查法拉亚河盆地流域营养物质产出排名
Dale M Robertson,Gregory E Schwarz,David A Saad et al.
Dale M Robertson et al.
Excessive loads of nutrients transported by tributary rivers have been linked to hypoxia in the Gulf of Mexico. Management efforts to reduce the hypoxic zone in the Gulf of Mexico and improve the water quality of rivers and streams could be...
Linking Hydrologic Alteration to Biological Impairment in Urbanizing Streams of the Puget Lowland, Washington, USA [0.03%]
美国华盛顿州普吉特低地城市化流域水文改变与生物阻滞的关联性研究
Curtis L Degasperi,Hans B Berge,Kelly R Whiting et al.
Curtis L Degasperi et al.
We used a retrospective approach to identify hydrologic metrics with the greatest potential for ecological relevance for use as resource management tools (i.e., hydrologic indicators) in rapidly urbanizing basins of the Puget Lowland. We pr...
Richard B Alexander,Elizabeth W Boyer,Richard A Smith et al.
Richard B Alexander et al.
Knowledge of headwater influences on the water-quality and flow conditions of downstream waters is essential to water-resource management at all governmental levels; this includes recent court decisions on the jurisdiction of the Federal Cl...