基于多时相遥感的梁子湖水体浊度变化分析  

Changes of Water Turbidity in Liangzi Lake Based on Multi-temporal Remote Sensing

作　　者：邓实权 田芷涵 白婷 谢珊 李文凯 顾欢欢 DENG Shi-quan;TIAN Zhi-han;BAI Ting;XIE Shan;LI Wen-kai;GU Huan-huan(Wuhan Water and Soil Conservation Monitoring Station,Wuhan Water Research Institute,Wuhan 430010,China;School of Computer Science,Hubei University of Technology,Wuhan 430010,China;South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 528299,China;Wuhan Ecological Environment Design and Research Institute Co.,Ltd.,Wuhan 430023,China)

机构地区：[1]武汉市水务科学研究院武汉市水土保持监测站,武汉430010 [2]湖北工业大学计算机学院,武汉430010 [3]中国科学院南海海洋研究所,广州528299 [4]武汉生态环境设计研究院有限公司,武汉430023

出　　处：《长江科学院院报》2025年第4期97-102,119,共7页Journal of Changjiang River Scientific Research Institute

基　　金：鄱阳湖湿地与流域研究教育部重点实验室(江西师范大学)开放基金资助项目(PK2021006);湖北省自然科学基金青年B项目(JCZRQN202500168);湖北工业大学博士启动基金(XJ2024004101)。

摘　　要：水体浊度是水环境的重要指标,能够直观地反映水体质量优劣。以梁子湖为研究对象,基于GEE遥感云计算平台,利用2003—2021年的Aqua MODIS遥感数据,反演了该湖的水体浊度情况,并分析了其时空变化的特征。结果表明:①梁子湖冬春季节的水体浊度高于夏秋季节,其中冬春季节的浊度高于30 NTU,而夏秋季节的浊度低于20 NTU;②梁子湖的水体浊度在近年逐渐降低,2011年前,水体浊度平均值约为30 NTU,且空间差异显著,临近陆地的区域浊度约为50 NTU,相较于平均值更高,2011年之后,水体浊度均值逐渐降低,约为25 NTU,其中临近陆地的区域浊度约为30 NTU,降幅明显;③梁子湖的水体浊度与梁子湖保护区范围内的土地覆盖类型具有相关性,其中绿地面积对其影响最大,相关系数为-0.63,绿地面积越大,浊度越低。由此可见,近10 a来,梁子湖的水体整体浊度从30 NTU下降至25 NTU,降低了16.67%,梁子湖的湖泊治理取得了较大成效。Water turbidity is a crucial indicator of aquatic environment as it directly reflects water quality.Taking Liangzi Lake as the research object,this paper utilized Aqua MODIS remote sensing data from 2003 to 2021 on the Google Earth Engine(GEE)remote sensing cloud computing platform to invert the water turbidity of the Liangzi lake and analyze its spatiotemporal variation characteristics.Results indicate the following:(1)Liangzi Lake features higher water turbidity in winter and spring than in summer and autumn,with turbidity exceeding 30 NTU in winter and spring and below 20 NTU in summer and autumn.(2)The water turbidity of Liangzi Lake has gradually decreased in recent years.Before 2011,the average water turbidity was approximately 30 NTU,with significant spatial variation.Areas close to land had a higher turbidity of about 50 NTU compared to the average.After 2011,the average water turbidity gradually decreased to about 25 NTU,with areas close to land experiencing a notable decrease to approximately 30 NTU.(3)The water turbidity of Liangzi Lake is correlated with land cover types within the Liangzi Lake Protected Area,with the green area having the greatest impact with a correlation coefficient of-0.63.Larger green areas correspond to lower turbidity.Over the past ten years,the overall water turbidity of Liangzi Lake has decreased from 30 NTU to 25 NTU,a reduction of 16.67%,indicating significant achievements in the management and improvement of Liangzi Lake.

关 键 词：水体浊度 多时相遥感 Aqua MODIS遥感数据 时空变化 梁子湖 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]