• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Yellow River Forum on River Basin Management >Development of a Distributed Modeling System for Simulating Nonpoint Source Pollution in Agricultural Fields
【24h】

Development of a Distributed Modeling System for Simulating Nonpoint Source Pollution in Agricultural Fields

机译：模拟农业田间非点源污染的分布式建模系统的开发

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Pesticide, as one of the typical nonpoint source pollutants, carried by surface runoff from agricultural areas constitute a significant portion of pollutant loading to surface waters. This paper attempts to simulate pesticide losses using a distributed model. To reflect spatial variations of pollutant concentrations, a river basin is conceptually divided into a number of cells, with each of them being uniform in terms of vegetation species, soil types, hydrological conditions, and topological characteristics. Thus, each cell can be treated as a unit with inflows from and outflows to other cells. The proposed model consists of six modules, including hydrology module to calculate runoff and peak flow, wash - off module to simulate pollutant wash - off from crop canopy and surface residue, adsorption module to describe adsorption/desorption processes in the mixing soil layer, pollutant - concentration module to reflect contamination levels in the soil, sediment module to analyze pollutant concentration in sediment leaving the field by runoff, and routing module to route pollutant movement with runoff. The developed model was applied to the Upper Auglaize River Basin that is located in northern Ohio, USA. The principal environmental problem in this basin is non - point source pollution, especially pesticide losses from agricultural fields. Thus, pesticides are the simulation target. The results were verified through observed data, indicating acceptable accuracy levels. The proposed model is valuable for supporting system forecasting and decision analysis for nonpoint source pollution control policies and practices.
机译：农药是由农业区域的地表径流携带的典型的非点源污染物之一构成了污染物载荷的重要部分。本文试图使用分布式模型模拟农药损失。为了反映污染物浓度的空间变化，河流盆地在概念上分为多种细胞，每个细胞都在植被物种，土壤类型，水文条件和拓扑特征方面均匀。因此，可以将每个细胞作为单位处理，其中流入并流出其他细胞。所提出的模型由六个模块组成，包括水文模块来计算径流和峰值流动，冲洗模块从作物冠层和表面残留物模拟污染物冲洗，吸附模块描述混合土层中的吸附/解吸过程，污染物 - 浓度模块反映土壤，沉积物模块中的污染水平，分析沉积物中的污染物浓度，通过径流，路由模块与径流污染物移动。开发的模型应用于USA北部的奥古兰河流盆地。该盆地的主要环境问题是非点源污染，特别是农业领域的农药损失。因此，杀虫剂是模拟靶标。通过观察到的数据验证结果，表明可接受的准确度水平。该模型是针对系统预测和决策分析非点源污染控制的政策和实践价值。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号