基于RSEI指数的泾惠渠灌区生态环境质量变化评价  

Evaluation of Ecological Quality Change in Jinghui Canal Irrigation District Based on RSEI Index

作　　者：赵晓涛 陶汪海 ZHAO Xiao-tao;TAO Wang-hai(Shaanxi Jinghui Canal Irrigation Administration,Xianyang 712000,Shaanxi Province,China;State Key Laboratory ofEco-hydraulics in Northwest Arid Region,Xi′an University of Technology,Xi′an 710048,Shaanxi Province,China)

机构地区：[1]陕西省泾惠渠灌溉管理中心,陕西咸阳713800 [2]西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安710048

出　　处：《中国农村水利水电》2023年第1期24-30,共7页China Rural Water and Hydropower

基　　金：国家自然科学基金项目“黄土旱塬区坡耕地作物生长对地表径流养分流失影响机制与定量表征”(52109064)。

摘　　要：生态环境问题是现代灌区高质量发展的重要内容,为探究泾惠渠灌区生态环境质量变化情况,究利用遥感生态指数(RSEI),评价了泾惠渠灌区2000-2020年的生态质量。结果表明,近20年泾惠渠灌区的RSEI值呈先降低后增大的特征;生态质量等级为优和良好的区域面积减少了30.19%,中等质量的区域面积增加了1.19倍,生态质量较差和差的区域上升了56.79%;灌区近20年生态退化区域占71.82%,无明显变化区域占15.61%,生态改善区域占12.56%;耕地RSEI值整体大于建设用地,耕地RSEI值下降了9.09%,建设用地RSEI值下降了9.26%。泾惠渠灌区自2010年以后,生态质量有所恢复,但总体水平依然不高,需要进一步大力改善。研究结果对泾惠渠灌区生态环境保护和农业可持续发展具有理论指导意义。Eco-environmental quality is a comprehensive representation of ecosystem elements, structures, and functions in time and space, reflecting the interaction of various limiting factors, landscape elements, and eco-hydrological processes. Therefore, the correct understanding and evaluation of the regional ecological environment are significant to constructing ecological civilization and ecological and environmental protection in China. Irrigation agriculture is an important food security area for the economic and social development of the Chinese Loess Plateau. Under rapid economic development, its fragile regional ecological environment needs to conduct a systematic research on the ecological security evaluation of the main agricultural irrigation areas on the Chinese Loess Plateau. In recent decades, the Jinghui Canal Irrigation District has achieved agricultural development and produced some ecological and environmental problems, such as surface water and groundwater environmental problems and soil environmental problems. Therefore, this paper takes Jinghui Canal Irrigation District as the research object, conducts research on the evolution characteristics of the ecological environment during the development process of the irrigation area(2000-2020), monitors possible ecological environment problems, and analyzes the possible causes. This paper uses the remote sensing ecological index(RSEI) to analyze the changes in the ecological environment quality of the Jinghui Canal Irrigation District. The RSEI index can comprehensively, quickly, and objectively reflect the regional ecological environment quality level. The results show that the RSEI value of Jinghui Canal Irrigation District has first decreased and then increased in the past 20 years. The area of good ecological quality grades has decreased by 30.19%, the area of medium ecological quality has increased by 1.19 times, and the area of poor ecological quality has increased by 56.79%. In the Jinghui Canal Irrigation District, 71.82% of the area ecologically ha

关 键 词：灌区 遥感 生态环境 RSEI指数 土地利用 

分 类 号：TV93[水利工程—水利水电工程] S19[农业科学—农业基础科学]