郫县农村生态健康状态及其影响因素  

Rural Ecosystem Health Situation and Influencing Factors of Pixian County,Sichuan

作　　者：田雨[1] 谢强[1] 罗伟[1] 黄雪菊[1] 

机构地区：[1]四川省环境保护科学研究院,成都610041

出　　处：《四川环境》2013年第S1期36-44,共9页Sichuan Environment

摘　　要：本文以郫县的水系图、行政区划和生态环境现状为基础,将郫县农村划分为柏条河流域、沱江河流域和清水河流域3个评估单元,并采用综合指数法对各评估单元的生态环境状况进行了综合评估,结果表明:水生生态健康指数(EHI)大小依次为清水河流域(70.95分,为"良好"级)>柏条河流域(66.95分,为"良好"级)>沱江河流域(64.34分,为"良好"级);陆域生态健康指数大小依次为柏条河流域(58.47分,为"一般"级)>清水河流域(51.40分,为"一般"级)>沱江河流域(49.40分,为"较差"级);综合生态健康指数为柏条河流域(63.56分,为"良好"级)>清水河流域(63.13分,为"良好"级)>沱江河流域(58.37分,为"一般"级)。郫县水域水质达标率、水生生物状况(大型底栖动物保持率、鱼类保持率以及特有性或指示性物种保持率)、水资源开发利用强度和陆域的生态格局(重要生境保持率)等指标的得分和生态健康指数相关系数较高(r均大于0.84)。郫县农村生态问题主要表现在流域内水质连年下降、陆域生态健康状况较差和日益严重的生活污染。本研究工作对科学制定郫县农村环境综合整治规划和实施方案,保护和改善郫县农村生态环境,推动郫县农村社会、经济和环境的协调发展均具有非常重要的意义。According to the water system,administrative divisions and the rural ecological environment investigation of Pixian county,the rural area in Pixian county was divided into three assessment units,Baitiao River watershed,Tuojiang River watershed and Qingshui River watershed to comprehensively evaluate the ecological environmental situation by using the comprehensive-index method. The results showed that the order of the aquatic ecosystem health index( EHI) was as follows: Qingshui River watershed( 70. 95 points,level'well') > Baitiao River watershed( 66. 95 points,level 'well') > Tuojiang River watershed( 64. 34 points,level 'well'). The order of the land ecosystem health index was Baitiao River watershed( 58. 47 points,level'common') > Qingshui River watershed( 51. 40 points,level'common') > Tuojiang River watershed( 49. 40 points,level'poor'). The order of comprehensive ecosystem health index was Baitiao River watershed( 63. 56 points, level'well') > Qingshui River watershed( 63. 13 points,level 'well') > Tuojiang River watweshed( 58. 37 points,level 'common'). The indexes,such as the water quality compliance rate,the status of aquatic organisms( large benthic animals retention rate,fish retention rate and specific or indicative species retentionrate),water resources development and utilization intensity in the aquatic ecosystem and ecological pattern( important habitat retention rate) in land ecosystem were highly correlated with the comprehensive ecosystem health index( r > 0. 84). The ecological problems in the rural areas of Pixian county mainly resulted from the declining water quality,poor land ecological health situation and serious residential pollution. This research work has very important significance for making scientific comprehensive improvement planning and implementation plan for rural environment of Pixian county,protecting and improving the rural ecological environment of Pixian county,and promoting the coordinated development of society,economic and environment in the rural areas of Pixian coun

关 键 词：生态健康指数 综合指数法 郫县 

分 类 号：X171[环境科学与工程—环境科学]