WASP model used to simulate flow and eutrophication in the central Salem River, New Jersey

A one-dimensional surface-water quality model of the central Salem River Basin, New Jersey was developed to examine the causes of eutrophication and predict the effects of reduced point and nonpoint source nutrient loads on water quality. The model was developed using the USEPA WASP code. The model simulates channel flow and the fate and transport of dissolved oxygen, oxygen demands, nutrients, and phytoplankton chlorophyll-a in the main stem river and largest tributary from April 1, 2007 to October 31, 2008. Continuous and discrete water-quality data from the Salem River were collected during this period to help build and calibrate the model. The calibrated model was used to evaluate the effects of (1) natural conditions and (2) an extreme reduction in nutrient loads. The scenarios involved reduction of nonpoint and point source nitrogen and phosphorous inputs to the river from the adjacent watershed and riverbed. This USGS data release contains all of the input and output files for the simulations described in the associated model documentation report (https://doi.org/10.3133/sir20225047)

本研究针对美国新泽西州塞勒姆河中游流域构建了一维地表水水质模型，旨在解析水体富营养化成因，并预测点源与非点源营养盐负荷削减对水质的影响。本模型基于美国环境保护署（USEPA）的WASP代码开发。该模型模拟了2007年4月1日至2008年10月31日期间，塞勒姆干流与最大支流的河道水流、溶解氧、需氧量、营养盐以及浮游植物叶绿素a的归趋与迁移过程。研究期间采集的塞勒姆河连续与离散水质数据，用于模型构建与率定。经率定后的模型被用于评估两类情景的水质效应：(1) 自然条件情景；(2) 营养盐负荷极端削减情景。上述情景涵盖了从邻近流域与河床向河道输入的非点源与点源氮、磷负荷削减。本美国地质调查局（USGS）发布的数据集包含了关联模型文档报告（https://doi.org/10.3133/sir20225047）中所述模拟的全部输入与输出文件。