基于灰水足迹的流域水环境评价

Water Environment Assessment Based on Gray Water Footprint

为实现更加科学的评价流域水环境,基于水足迹理论,提出了更为全面的流域灰水足迹核算评价方法,解决了以往流域灰水足迹评价中污染核算不全面、参数选取原则不统一的问题。以大连市复州河流域为例,从工业、居民生活、畜禽养殖业和种植业四个污染源分析了2018年流域灰水足迹量值与空间特征,同时进行流域水环境评价。结果显示:2018年复州河流域灰水足迹为29.23亿m^(3),其中工业灰水足迹为0.27亿m^(3),居民生活污染灰水足迹为6.31亿m^(3),畜禽养殖业灰水足迹为13.03亿m^(3),种植业灰水足迹为9.62亿m^(3),总体上呈现沿河流自上游向下游逐渐递增,在入海口处有所降低的趋势。2018年复州河流域水污染程度为846.35%,表明流域内地表水纳污能力已全部耗尽,无法吸收净化流域内每年产生的污染物数量。研究结果较好的评价了流域水环境现状,可为复州河流域水环境治理与其他流域水环境评价提供参考。

In order to achieve a more scientific assessment of the water environment in the basin,a more comprehensive assessment method of gray water footprint in the basin is proposed based on the water footprint theory,to solve the problems of incomplete pollution accounting and inconsistent parameter selection principles in the previous assessment of gray water footprint in the basin.This study analyzes the gray water footprint and spatial characteristics of the river basin in 2018 from four pollution source:industry,resident life,livestock breeding and planting in the Fuzhou River Basin,and evaluates the water environment of the basin.The results show that the gray water footprint of the Fuzhou River Basin in 2018 was 2.923 billion m3,of which the industrial gray water footprint was 0.027 billion m3,the residents'pollution gray water footprint was 0.631 billion m3,the livestock breeding gray water footprint is 1.303 billion m3,and the gray water footprint of the planting industry was 0.962 billion m3.In 2018,the water pollution level of Fuzhou River Basin was 846.35%,which indicated that the surface water and pollution capacity in the basin had been completely exhausted and could not absorb the amount of pollutants produced in the purification basin every year.The results of the study quantify the gray water footprint of the basin and evaluate the current status of the water environment in the basin,which can provide a reference for the water environment management of the Fuzhou River Basin and other basin water environment assessments.