Stream Nitrogen Sources Apportionment and Pollution Control Scheme Development in an Agricultural Watershed in Eastern China
Stream Nitrogen Sources Apportionment and Pollution Control Scheme Development in an Agricultural Watershed in Eastern China
复制标题
中国东部农业流域溪流氮源分配及污染控制方案制定
DOI：
10.1007/s00267-013-0112-y
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发表时间：
2013-06
影响因子：
3.5
通讯作者：
Chen, Jiabo
中科院分区：
文献类型：
--
作者：
Chen, Dingjiang;Lu, Jun;Huang, Hong;Liu, Mei;Gong, Dongqin;Chen, Jiabo
建立了基于土地利用的输出系数模型、河流养分输运方程和贝叶斯统计相结合的河流氮源分配模型。它将一个流域划分为几个子集水区，然后考虑每个子集水区的主要土地利用类别作为流氮源。径流深度和河流水深被认为是影响各子集水区土壤氮向下游节点输送的主要因素。氮源和输送过程被集中到几个恒定参数中，这些参数使用贝叶斯统计数据从常用的河流监测和土地利用数据集进行校准。该模型成功地应用于长乐河流域6个子集水区和4种土地利用类型的总氮污染控制方案的制定。评估了非点源（NPS）总氮向河流通道输出和向流域出口输送的时间（跨月、跨年）和空间（跨子流域和土地利用类型）变异性。在调整了流内全氮滞留量后，确定了对流贡献不成比例高全氮的时间段和流域区域。针对目标河流TN水平为2 mg L−1，进一步制定了定量TN污染控制方案，以确定哪些子集水区、子集水区的土地利用类别、时间段以及需要减少多少NPS TN出口。该建模系统为流域尺度上的河流氮源分配和污染控制方案的制定提供了有力的工具，且数据要求有限。
A modeling system that couples a land-use-based export coefficient model, a stream nutrient transport equation, and Bayesian statistics was developed for stream nitrogen source apportionment. It divides a watershed into several sub-catchments, and then considers the major land-use categories as stream nitrogen sources in each sub-catchment. The runoff depth and stream water depth are considered as the major factors influencing delivery of nitrogen from land to downstream stream node within each sub-catchment. The nitrogen sources and delivery processes are lumped into several constant parameters that were calibrated using Bayesian statistics from commonly available stream monitoring and land-use datasets. This modeling system was successfully applied to total nitrogen (TN) pollution control scheme development for the ChangLe River watershed containing six sub-catchments and four land-use categories. The temporal (across months and years) and spatial (across sub-catchments and land-use categories) variability of nonpoint source (NPS) TN export to stream channels and delivery to the watershed outlet were assessed. After adjustment for in-stream TN retention, the time periods and watershed areas with disproportionately high-TN contributions to the stream were identified. Aimed at a target stream TN level of 2 mg L−1, a quantitative TN pollution control scheme was further developed to determine which sub-catchments, which land-use categories in a sub-catchment, which time periods, and how large of NPS TN export reduction were required. This modeling system provides a powerful tool for stream nitrogen source apportionment and pollution control scheme development at the watershed scale and has only limited data requirements.
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影响因子：
12.8
作者：
I. Takeda;A. Fukushima;R. Tanaka
通讯作者：
I. Takeda;A. Fukushima;R. Tanaka
DOI：
10.1016/s0048-9697(00)00820-2
发表时间：
2001-03
期刊：
The Science of the total environment
影响因子：
--
作者：
Linda May;W. House;M. Bowes;Jim McEvoy
通讯作者：
Linda May;W. House;M. Bowes;Jim McEvoy
影响因子：
9.9
作者：
A. Vassiljev;I. Blinova;P. Ennet
通讯作者：
A. Vassiljev;I. Blinova;P. Ennet
DOI：
10.1016/j.scitotenv.2008.06.009
发表时间：
2008-11
期刊：
The Science of the total environment
影响因子：
--
作者：
Zhenyao Shen;Qian Hong;Hong Yu;Ruimin Liu
通讯作者：
Zhenyao Shen;Qian Hong;Hong Yu;Ruimin Liu
DOI：
10.1016/j.agee.2009.06.011
发表时间：
2009-12
期刊：
Agriculture, Ecosystems & Environment
影响因子：
--
作者：
Dingjiang Chen;Jun Lu;Ye-na Shen;R. Dahlgren;Shu-quan Jin
通讯作者：
Dingjiang Chen;Jun Lu;Ye-na Shen;R. Dahlgren;Shu-quan Jin