2000年以来的渭河流域实际蒸散发时空格局分析

被引:18
作者
董晴晴 [1 ]
占车生 [2 ]
王会肖 [1 ]
王飞宇 [2 ,3 ]
朱明承 [1 ]
牛存稳 [4 ]
机构
[1] 北京师范大学水科学研究院
[2] 中国科学院地理科学与资源研究所陆地水循环及地表过程重点实验室
[3] 中国科学院大学
[4] 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室
关键词
实际蒸散发; MOD16; 土地利用类型; 时空格局变化;
D O I
10.13826/j.cnki.cn65-1103/x.2016.02.012
中图分类号
P426.2 [蒸发与蒸散];
学科分类号
0706 ; 070601 ;
摘要
基于MOD16遥感蒸散发产品,利用降雨径流资料和全球陆面蒸散发估算数据集(MTE)进行精度评价,通过空间建模、趋势分析、标准差法分析了渭河流域2000-2013年实际蒸散发(ET)的年际和年内时空格局变化,探讨了不同土地利用类型下实际蒸散发的差异性变化特征。结果表明:(1)2000-2013年间渭河流域年ET呈缓慢增加趋势,年际波动较大,空间上呈北低南高的趋势,多年平均蒸散发为509.8 mm。(2)年内ET呈单峰型分布,季节性变化明显,主要集中在5~9月份,最高和最低值分别出现在8月和1月;(3)渭河流域ET变化趋势呈减少、基本不变、增加的区域面积分别占14.9%,24.7%和60.4%,年际波动程度整体呈现中度波动。(4)不同土地利用类型ET的分布总体上林地的年ET均值最高,草地、农田和城镇次之,裸地最低。
引用
收藏
页码:327 / 335
页数:9
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