泾河上游植被覆盖动态及其与降水泾流的关系

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采用Mann-Kendall法、双累积曲线法和二维视图技术分析泾河三关口以上流域1982年~2006年植被动态、降水及径流变化,研究植被与降水径流的关系.结果表明,降水量呈下降趋势,流域逐年植被覆盖从20世纪90年代中后期呈下降趋势,均不显著;径流量呈显著下降趋势,且在1995年出现突变.植被与降水的关系不太密切,而植被类型改变对径流减少的作用不可忽视.
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