管理的输入压力,以改善水质的收获范围的水质
P J A Withers1, S A Rothwell1, K J Ross1
1Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, UK.
Journal of environmental management
|October 10, 2024
概括
来自农业和废水的污染威胁到淡水生态系统. 减少农业过剩和改善废水处理对于减轻河流污染和保护水生生物多样性至关重要.
科学领域:
- 环境科学 环境科学
- 水质管理水质管理
- 营养素循环循环的过程
背景情况:
- 淡水 (P) 污染对水质和水生生物多样性构成重大威胁.
- 农业和废水是淡水污染的主要原因.
研究的目的:
- 量化和区分来自农业和废水部门的输入压力.
- 将这些P输入压力与斯托尔河流域的污染威胁联系起来.
- 评估缓解策略对改善水质的有效性.
主要方法:
- 使用物质流量分析 (SFA) 来计算来自农业和废水的P输入压力.
- 分析了斯托尔河流域的生理学区域.
- 河流P流与人为净P输入 (NAPI) 有关.
- 河流P度 (C) 和流量排放 (Q) 数据被用来区分分散的P源.
主要成果:
- 农业P投入与牲畜料进口和肥有关,而人类P投入是由食品进口和人口密度驱动的.
- 总P输入压力 (NAPI) 与河流P流量有很强的相关性 (r2 0.80.9).
- 估计的农业P流量高达0.92公斤ha-1年-1,取决于土地P余.
- 如果将农业P余减少7公斤,河流SRP度可以降低三分之一,但仍然高于安化目标.
结论:
- 为了改善水质,需要采用增强废水P排放和减少农业P投入的综合方法.
- 将SFA输出与河流P数据联系起来的方法为制定有效的缓解目标提供了有价值的工具.
- 建议在其他水域对这种方法进行进一步的测试,以确定其国际相关性.
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