Pesticide concentration and streamflow datasets used to evaluate pesticide trends in the Nation’s rivers and streams, 1992-2012 (output)

In 1991, the U.S. Geological Survey (USGS) began a study of more than 50 major river basins across the Nation as part of the National Water-Quality Assessment (NAWQA) project of the National Water-Quality Program. One of the major goals of the NAWQA project is to determine how water-quality conditions change over time. To support that goal, long-term consistent and comparable monitoring has been conducted on streams and rivers throughout the Nation. Outside of the NAWQA project, the USGS also has collected long-term water-quality data to support additional assessments of changing water-quality conditions. These data have been combined to provide insight into how natural features and human activities have contributed to water-quality changes over time in Nation’s streams and rivers. This USGS data release contains all of the input and output files necessary to reproduce the results from the SEAWAVE-Q pesticide models described in the associated U.S. Geological Survey Scientific Investigations Report. Data preparation for input to the model is also fully described in the above mentioned report.

1991年，美国地质调查局（U.S. Geological Survey, USGS）作为国家水质计划（National Water-Quality Program）下属的国家水质评估（National Water-Quality Assessment, NAWQA）项目的组成部分，启动了针对全美50余个主要流域的研究工作。该项目的核心目标之一是探明水质条件随时间的变化规律。为支撑该目标的实现，研究团队对全美范围内的溪流与河流开展了长期、统一且具备可比性的监测工作。除NAWQA项目外，USGS还另行收集了长期水质数据，用于开展其他针对水质变化状况的评估工作。上述两类数据已被整合，以揭示自然环境特征与人类活动如何共同推动全美溪流与河流的水质随时间发生演变。本次USGS发布的数据集合包含了复现相关美国地质调查局科学调查报告（U.S. Geological Survey Scientific Investigations Report）中所述SEAWAVE-Q农药模型（SEAWAVE-Q pesticide models）结果所需的全部输入与输出文件，模型输入数据的准备流程也已在上述报告中完成完整说明。