确定一个大规模复杂盆地中和损失管理的关键区域:吉林河
Yuanxin Ren1, Jun Xia2, Sidong Zeng3
1Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi'an, 710127, China; Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing, 400714, China.
Environmental research
|June 9, 2023
概括
鉴定 (N) 和 (P) 在吉林河流失的关键区域是有效管理的关键. 确定了N和P损失的热点地区,指导了改善水质的有针对性的干预措施.
科学领域:
- 环境科学 环境科学
- 水文学的水文学
- 水质管理水质管理
背景情况:
- 来自大规模盆地的 (N) 和 (P) 损失带来了重大的环境和经济挑战.
- 有效的管理需要精确识别关键区域,以减少营养损失.
研究的目的:
- 分析2000年至2019年江陵河流域N和P损失的空间和时间特征.
- 确定N和P损失的关键管理区域 (热点),以提高区域管理效率.
主要方法:
- 使用土壤和水评估工具 (SWAT) 模型来模拟N和P损失.
- 应用Theil-Sen中位数分析和曼-肯德尔测试来分析趋势.
- 雇佣Getis-Ord Gi*统计数据以确定重要的冷点和热点地区.
主要成果:
- 对于N的年平均单位负载损失在1.21-54.53公斤/公之间,对于P的年平均单位负载损失在0.05-1.35公斤/公之间.
- 无论是N还是P的损失都表现出年际下降趋势,季节性变化很大 (夏季最高,冬季最低).
- 在特定的上游,中游和下游地区确定了N和P损失的热点区域,表明管理的关键区域.
结论:
- 吉林河流域N和P损失的热点地区已被确定为有针对性的管理至关重要.
- 管理策略应考虑N和P损失的独特空间分布和季节性动态.
- 管理计划的调整应以污染物为特征,并根据季节性情况进行调整,以获得最佳的结果.
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