摘要
基于1950—2005年的水文和气象数据及1986、1996和2001年黄河三角洲遥感影像解译数据，运用回归分析和主成分分析方法探究主要湿地景观格局演变与水文气象要素之间的定量关系，建立了湿地景观面积与水文、气候要素之间的回归模型，结果表明，进入黄河三角洲的河流径流量200亿～300亿m^3、输沙量5亿-8亿t是维持湿地景观格局稳定最适宜的径流和泥沙过程；河流径流量和输沙量是影响黄河三角洲湿地格局演变的主要分异因素，并与湿地景观面积呈显著正相关关系。这些认识将有利于掌握黄河三角洲湿地的变化特性，对建立湿地退化预警机制和生态环境保护具有重要意义。
In this study, based on the consecutive hydrological and climate records in the past 50 years and the landsat scanning images in the Yellow River Delta from 1986 to 2001, the quantitative relationship between the area of the main wetland type and the nmoff and sediment changes are well established through the regression analysis. The results indicate that the runoff at 200×10^8 - 300 ×10^8 m^3 and the sediment discharge at 5 × 10^8 - 8× 10^8 t into the Yellow River Delta are probably the most appropriate range for maintaining the stability of the wetland landscape pattern. There exists the close positive relation among area, runoff and sediment discharge. The regression models are established between the area and the hydrological and climate parameters in order to provide scientific basis for the establishment of the early warning mechanism and the protective strategy for the degenerated wetland.
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2009年第3期325-331,共7页
Advances in Water Science
基金
国家重点基础研究发展计划(973)资助项目(2006CB403301)~~
关键词
水沙变化
黄河三角洲
湿地
景观格局
water-sediment variation
Yellow River Delta
wetland
landscape pattern
