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作 者:龚翔峰 徐守刚 孟定华 毛劲乔 顾小涵 朱诗洁 GONG Xiangfeng;XU Shougang;MENG Dinghua;MAO Jinqiao;GU Xiaohan;ZHU Shijie(Jiangsu Shahe Pumped Storage Power Generation Co.,Ltd.,Liyang 213333,China;College of Water Conservancy&Hydropower Engineering,Hohai University,Nanjing 210098,China)
机构地区:[1]江苏沙河抽水蓄能发电有限公司,江苏溧阳213333 [2]河海大学水利水电学院,江苏南京210098
出 处:《人民珠江》2023年第2期90-95,共6页Pearl River
基 金:国家自然科学基金(52109013);中国博士后科学基金(2021M701049);重点工程科技项目(JSPC-2021-AS-00011)。
摘 要:天目湖沙河流域集饮用、灌溉、旅游、渔业等多种功能为一体,对区域生态安全保障起到至关重要的作用。针对该区域保护与开发并存的实际需求与压力,为研究区域富营养化程度及人类活动对库区主要水环境因子的综合影响,以2001、2011、2021年3个时段卫星遥感影像与叶绿素a浓度监测值为基础数据进行相关研究:①研究时间段内天目湖流域均处于中富营养状态;②根据遥感影像将天目湖流域内的土地类型分为水体、林地、草地、耕地、建筑用地、裸地,其中耕地面积受人类活动的影响增长83%;③分析了各土地利用面积与库区水质目标管理核心指标叶绿素浓度变化的相关性。结果表明:叶绿素a浓度与水体、林地、建筑用地、耕地面积成正相关,与草地、裸地面积成负相关,其中建筑用地、耕地面积与叶绿素浓度的相关系数分别为0.536和0.773,均在一定程度上影响着库区水环境状态。研究结论从流域尺度表明了沙河流域土地利用与水环境保护存在密切联系,可为实施库区系统规划和保护提供重要参考。The Shahe River Basin of Tianmu Lake provides drinking,irrigation,tourism,fishery,and other functions,which plays a crucial role in regional ecological security.In view of the actual demand and pressure of coexisting protection and development in this region,this study aims to make clear the comprehensive impact of regional eutrophication and human activities on the main water environmental factors in the reservoir area.Satellite remote sensing images and monitored chlorophyll-a concentrations in 2001,2011,and 2021 were used as basic data for research:①During the study period,the basin was in a state of moderate eutrophication.②According to remote sensing images,the land types in the Tianmu Lake area can be divided into water body,forest land,grassland,cultivated land,building land,and bare land.The cultivated land area was increased by 83%due to human activities.③A correlation analysis was conducted between the area of each land use type and the change of chlorophyll-a concentration(the key index of water quality objective management)in the reservoir area.The results show that chlorophyll-a concentration is positively correlated with the areas of water body,forest land,building land,and cultivated land and negatively correlated with the areas of grassland and bare land.The correlation coefficients of chlorophyll-a concentration with the areas of building land and cultivated land are 0.536 and 0.773,respectively,which both influenced the water environment of the reservoir area to a certain extent.There is a close relationship between land use and water environment protection in the Shahe River Basin,which can provide important reference for the system planning and protection of the reservoir area.
关 键 词:土地利用 叶绿素浓度 卫星数据 天目湖 沙河流域
分 类 号:X824[环境科学与工程—环境工程]
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