丹江口库区土地利用格局与水质响应关系

发布时间：2018-01-02 02:04

本文关键词：丹江口库区土地利用格局与水质响应关系　出处：《环境科学研究》2016年09期 　论文类型：期刊论文

【摘要】：为探究山地丘陵地区不同土地利用类型对流域水质的影响,利用2014年丹江口库区流域Landsat 8遥感影像数据(分辨率为30 m)和14条入库河流的水质数据,以库区14个小流域为基本研究单元,采用流域分割和多元统计分析相结合的方法研究土地利用类型对入湖河流水质的影响.结果表明:丹江口库区14条直接入库河流ρ(COD_(Cr))、ρ(TN)、ρ(NH_4~+-N)和ρ(TP)年均值分别为14.98、4.06、1.32和0.17 mg/L,可将其划分为3组,即清水保育型、轻污染防控型和重污染治理型,各组之间的显著性差异指标为ρ(COD_(Cr))、ρ(NH_4~+-N)、ρ(TN)和ρ(TP).冗余分析显示,建设用地对14条主要入库河流水质指标的影响最大,尤其是对重污染河流ρ(TN)、ρ(COD_(Cr))和ρ(CODMn)的影响较大,应划为蓝线优化开发区;耕地对清水保育型和轻污染防控型河流ρ(TN)和ρ(TP)的影响较大,并且对ρ(TN)的影响大于ρ(TP),划为黄线控制区;林地有助于削减水体污染物,是流域主要清水产流区,划为红线保护区.
[Abstract]:To explore the impact of hilly area of different land use types on water quality in the reservoir area of Danjiangkou basin in 2014, using Landsat 8 remote sensing image data (resolution 30 m) and 14 rivers water quality data, the basic research unit in the reservoir area of 14 small watershed, land research method of flow domain segmentation and multivariate statistical analysis in combination the effects of use types on water quality of rivers into the lake. The results show that the Danjiangkou reservoir area of 14 direct rivers (P COD_ (Cr)), P (TN), P (NH_4~+-N) and P (TP) annual average values were 14.98,4.06,1.32 and 0.17 mg/L, which can be divided into 3 groups, namely water conservation type light and heavy, pollution prevention and control of pollution treatment, the index was significant difference between the groups of rho (COD_ (Cr)), P (NH_4~+-N), P (TN) and P (TP). Redundancy analysis showed that the influence of construction land on the 14 main rivers water quality index, especially for heavy The pollution of rivers P (TN), P (COD_ (Cr)) and P (CODMn) has great influence, should be optimized development zone for the blue line of water; cultivated land conservation and light pollution prevention and control of river P (TN) and P (TP) effect, and the effect of P (TN) greater than P (TP), designated as the yellow line control area; woodland helps to reduce pollutants in water, is the main water basin runoff area, designated red line protection zones.

【作者单位】：中国环境科学研究院环境基准与风险评估国家重点实验室;
【基金】：国家水体污染控制与治理科技重大专项(2012ZX07101-013)
【分类号】：X52
【正文快照】： 水体污染的根本来源不仅是河流、湖库水体本身,更重要的是流域内与土地利用息息相关的人类生活与生产活动[1-2].湖库流域土地利用变化不仅改变流域景观格局,还能引起流域物质循环和能量变化,影响非点源污染物的发生、迁移和转化,进而可能对流域水环境产生深刻影响[3-4].水土流

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