基于Mann-Kendall方法的水土流失时空格局变化  

Analysis on Spatiotemporal Dynamics of Soil and Water Loss by Using Mann-Kendall Approach

作　　者：江振蓝[1] 

机构地区：[1]闽江学院地理科学系,福州350108

出　　处：《水土保持研究》2016年第2期60-65,72,共7页Research of Soil and Water Conservation

基　　金：福建省测绘地理信息局项目(2014M02);福建省教育厅项目(JA12267);福州市科技计划项目(2014S130);闽江学院项目(YKQ13005)

摘　　要：实时准确把握水土流失的时空变异规律是制定合理有效水土流失防治措施的基础。利用RUSLE方程对浙江省安吉县2000—2012年的水土流失风险进行估算,获取共13期(每年1期)的水土流失时间序列数据。在此基础上,利用Mann-Kendall方法进行水土流失时空格局变化分析。结果表明:研究期间安吉县水土流失风险呈现显著上升趋势,具体表现为遭受水土流失风险范围呈现显著增长的同时,遭受水土流失的风险等级也呈现显著上升趋势。利用Mann-Kendall方法进行水土流失变化分析,较空间叠加分析方法更能真实地反映水土流失的时空格局变异规律,所得结果更为详实,更符合实际,可为水土流失的长时间序列动态变化分析提供新思路。Accurate and timely information on spatiotemporal dynamics of soil loss is crucial for making effective soil and water conservation measures. By using RUSLE formula, an estimation was made on soil loss risks in Anji County of Zhejiang Province during the period from 2000 to 2012, and time series data of soil loss were thus obtained for 13 periods （one period per year）. Then an analysis was made on spatiotemporal dynamics of soil and water loss by using Mann Kendall approach. The results showed an evident trend of increasing risk of soil loss in the county during the study periods, when the area of soil and water loss obviously increased, the level of risk also showed an obvious trend of increase. ManwKendall approach, in comparison with spatial overlapping approach, can reveal spatiotemporal dynamics of soil and water loss more accurately and specificly. This approach can provides a new perspective on the analysis of long-term dynamics of soil and water loss.

关 键 词：Mann-Kendall方法 水土流失 时空格局 趋势分析 

分 类 号：S157[农业科学—土壤学]