黄河下游湿地景观特征及其对来水来沙的响应  

Landscape Characteristics of Wetland in Lower Yellow River Basin and Feedback to Runoff and Sediment Load

作　　者：丁艳峰[1] 潘少明[1] 

机构地区：[1]南京大学海岸与海岛开发教育部重点实验室,南京210093

出　　处：《河南科学》2007年第2期311-315,共5页Henan Science

基　　金：国家重点基础发展规划(973)资助项目(2002CB412401)

摘　　要：利用黄河下游利津、泺口和花园口1950-2005年水沙数据、1987年和2002年两期下游滩地、河流和坑塘湿地数据,运用景观生态学基本理论,分析黄河下游湿地景观格局的演变,讨论湿地时空变化对来水来沙的反馈效应.结果表明,近20年来,黄河下游湿地大幅缩减,滩地景观减少最多,受人为和自然因素双重作用,景观斑块多样性变化不一.回归分析表明,滩地面积与来沙存在负相关,受来水减少影响,主河道萎缩严重,河口延伸速率减缓.Based on two phases （1987.2002）vector data about wetland in lower Yellow River basin and runoff and sediment load data, we reconstructed the former landscape structure and elucidated the changes in landscape patterns during the last 20 years, and discussed the feedback to the runoff and sediment load. The result shows that the wetland in the lower Yellow River basin decreases greatly in the last 20 years, especially the beach landscape type. Influenced by natural and human activities, the block diversity index changes inconsistently with each other. Regression analysis shows that there is a negative relationship between beach area and sediment load. Because the reduction of runoff, the main riverway is atrophic, and the land accretion rate is slow down.

关 键 词：黄河下游 湿地 景观格局 来水来沙 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P731.7[天文地球—测绘科学与技术]