丹江口水库土地利用与水质变化响应关系研究  

Study on the Relationship between Land Use and Water Quality Change in Danjiangkou Reservoir

作　　者：刘金宝 刘轩 孙增慧 赵永华 王博 无 LIU Jinbao;LIU Xuan;SUN Zenghui;ZHAO Yonghua;WANG Bo;无(Technology Innovation Center for Land Engineering and Human Settlements,Shaanxi Land Engineering Construction Group Co.,Ltd and Xi'an Jiaotong University,Xi’an 710075,China;Institute of Resources and Environment,Henan Polytechnic University,Jiaozuo 454003,China;Institute of water Resources and hydro-electric Engineering,Xi’an university of technology,Xi’an 710048;College of Life Sciences,Yulin University,Yulin 719000,China;School of Land Engineering,Changan’University,Xi’an 710061,China)

机构地区：[1]陕西地建-西安交大土地工程与人居环境技术创新中心,陕西西安710049 [2]河南理工大学资源环境学院,河南焦作454003 [3]西安理工大学水利水电学院,陕西西安710048 [4]榆林学院生命科学学院,陕西榆林719000 [5]长安大学土地工程学院,陕西西安710061

出　　处：《遥感技术与应用》2023年第2期285-296,共12页Remote Sensing Technology and Application

基　　金：陕西地建—西安交大土地工程与人居环境开放基金(2021WHZ0088);国家自然科学基金地区科学基金项目(42167039);教育部人文社会科学青年基金项目(22YJC630093);河南理工大学博士基金项目(B2017-12)。

摘　　要：丹江口水库是南水北调中线工程水源地,明确土地利用景观格局与水质参数之间的响应关系,是保护及改善水质的重要前提。利用Sentinel-2B遥感影像数据对土地利用状况进行分类,基于GIS空间分析技术计算土地利用类型综合效应的景观开发强度指数,结合自动监测站点水质数据,采用冗余分析(RDA),初步探讨了丹江口水库土地利用与水质变化二者之间的响应关系。结果表明:500 m缓冲区的总解释率在枯水期与丰水期在第一轴上典型特征值为0.6055和0.5833,总解释率分别为71.3%和72.6%,在全部缓冲区内最高,该缓冲区的土地利用对水质的影响最大。在该缓冲区内耕地和建筑用地分布集中且连通性和聚集程度较高,对河流的污染相对较高,林地相对较多且整体连通性和聚集程度较高,对水质污染起到了一定的抑制作用。研究结果揭示了在水库周边相邻地区,农业种植区施肥和畜牧业所产生的营养物质,通过地表径流冲刷进入湖泊的营养物质是丹江口水库非点源污染的主要贡献来源。库区周边一方面要增加森林覆盖度从而增强植被改善河流水面源污染方面的强度;另一方面,要防止农业生产所产生的氮、磷对水质的影响,以减少整个库区的面源污染。Clarifying the response relationship between landscape pattern or land use and water quality parameters is an important prerequisite for protecting and improving water quality.The Danjiangkou Reservoir is the water source for the South-to-North Water Diversion Project.Agricultural planting and industrial production activities will affect the water quality of the reservoir area in various ways.Using Sentinel-2B remote sensing im-age data to classify the land use status,based on the GIS spatial analysis technology to calculate the landscape development intensity index of the comprehensive effect of land use types,combined with the water quality data of the automatic monitoring station,using redundancy analysis(RDA),a preliminary discussion of Danjiangkou the response relationship between reservoir land use and water quality changes.The results show that the nutrients produced by fertilization and animal husbandry in agricultural planting areas,and the nutrients that enter the lake through surface runoff are the main sources of non-point source pollution of Danjiangkou Reservoir.Land use in a 500 m buffer zone has the greatest impact on water quality.In this buffer zone,cultivated land and construction land are concentrated and have a high degree of connectivity and agglomeration.The pollution to rivers is relatively high.There are relatively more woodlands and overall connectivity and the degree of aggregation is relatively high,which has a certain inhibitory effect on water pollution.In the adjacent areas around the reservoir,on the one hand,it is necessary to increase forest coverage so as to increase the intensity of vegetation to improve river surface source pollution;on the other hand,it is necessary to prevent the impact of nitrogen and phosphorus from agricultural production on water quality to reduce the entire reservoir area of non-point source pollution.

关 键 词：土地利用 水质变化 响应关系 冗余分析 丹江口水库 

分 类 号：F301[经济管理—产业经济] X524[环境科学与工程—环境工程]