期刊论文

中文

干旱区资源与环境

1003-7578

2011

25

6

147-153

10.13448/j.cnki.jalre.2011.06.027

国家自然科学基金项目（批准号：4059942440473006） 西北师范大学科研骨干和青年基金（批准号：nwnu-kjcxgc-03-59 nwnu-qn-06-30）资助

本校为其他机构

通过借助GIS空间分析技术,小波分析方法和数理统计理论,对甘南州近35年来蒸发量时空特征进行定性分析并阐述其对生态环境的影响.结果表明:近35年来甘南州蒸发量总体上呈上升趋势且通过了显著性检验,其中上升趋势最快的是甘南州东南部区域的舟曲和卓尼.从时间上看,蒸发量的变化呈波动式上升状态.其中1980s是整个甘南州蒸发量最小的,最湿润的时代,其它年代,蒸发量都有不同程度的上升趋势,特别是在21世纪表现尤为明显;从空间分布上看,蒸发量分布的区域差异较大并呈现出由西北向东南逐渐递增的态势与干湿程度(干燥指数)的地域分布相吻合;从周期性上看,年蒸发量主要以12a和17-18a的周期振荡为主.从环...

We analyzed the temporal and spatial characteristics of the evaporation capacity and variation of evaporation in recent 35 years in Gannan Prefecture of Gansu Province combined with GIS spatial techniques,wavelet analysis and mathematical statistical theory,and illuminated the influence of ecological environment.The results showed that the changing trend of evaporation capacity was an overall upward by passing distinctly test and the trend was remarkable in Zhouqu and Zhuoni of the southeastern region.In terms of the time,the changing trend of evaporation capacity was fluctuant situation upwar...