摘要
全流域水量统一调度是缓解黄河断流,维护流域生态环境的重要举措。水量调度效果如何,河口生态环境变化状况是非常重要的衡量指标。文章提出了评价水量调度效果的河口生态环境对比指标,并尝试运用遥感技术、水文数据和调查资料,对比分析了水量调度前后河口三角洲生态环境变化情况。结果表明,黄河水量统一调度后,河口三角洲最小河道生态基流在非汛期基本得到满足,断流现象不再发生,径流入海率和输沙入海量有所增加,淡水湿地面积逐渐增多,物种多样性明显得到改善。这反映出黄河流域水量统一调度后,河口三角洲生态环境正逐步恢复。
Water regulation at the scale of whole watershed is an important measure to alleviate flow interruption and protect the ecosystem environment of watershed in the yellow river. The indexes of estuarine ecosystem environment can assess the effects of water regulation. This paper mainly puts forward the comparative index for ecosystem environment relating with water dispatching, and analyses the variation of ecosystem environment by using remote sensing, hydrological data and investigated data. After the implementation of water regulation, the river course in delta reaches the minimum ecological flux, and no flow interruption take place; the runoff flowing into the sea and the transporting sediment increase; the areas of fresh water wetland is also increased gradually; species variety get instauration obviously. These reflect that the delta ecosystem environment has gradually ameliorated.
出处
《生态环境》
CSCD
北大核心
2006年第5期1046-1051,共6页
Ecology and Environmnet
基金
资源环境与地理信息系统北京市重点实验室开放基金项目
国家自然科学基金项目(40272105)
关键词
水量调度
生态环境
遥感
黄河三角洲
water resources regulation, ecosystem, remote sensing, Yellow River Delta
