基于RUSLE模型的喀斯特地区土壤侵蚀动态变化研究——以盘州市为例

曲靖师范学院学报 ›› 2018, Vol. 37 ›› Issue (3): 71-77.

• 云贵高原资源环境研究 • 上一篇下一篇

基于RUSLE模型的喀斯特地区土壤侵蚀动态变化研究——以盘州市为例

胡先培, 钱庆欢, 郭程程

贵州师范大学地理与环境科学学院,贵州贵阳 550025

收稿日期:2017-12-29 出版日期:2018-05-26
作者简介:胡先培,贵州师范大学地理与环境科学学院硕士研究生,主要从事水土保持与生态恢复研究.
基金资助:
贵州省科技计划项目“旅游地乡村聚落演变与土地利用模式变化研究”(黔科合LH字(2016)7202号).

Study on dynamic change of soil erosion in Karst region based on RUSLE model——Taking Panzhou City as an Example

Hu Xianpei, Qian Qinghuan, Guo Chengcheng

School of Geography and Environmental Science, Guizhou Normal University, Guiyang Guizhou 550025,China

Received:2017-12-29 Published:2018-05-26

摘要/Abstract

摘要： 对区域土壤侵蚀进行定量评价,为土壤侵蚀治理工作和土地利用决策提供科学依据. 基于GIS及修正RUSLE模型,以日降雨量12 mm和30 mm为侵蚀性降水起算值,基于DEM数据,利用2000~2015年贵州省盘州市的NDVI、日降雨量、土壤和土地利用数据,计算土壤侵蚀模数. 结果表明:传统算法在喀斯特广泛发育区域高估了土壤侵蚀量,改进后的降雨侵蚀力更符合当地实际情况|盘州市2000年的平均土壤侵蚀模数修正为67.97 t ha^-1yr^-1,2015年为23.33 t ha^-1yr^-1|土壤侵蚀强度等级转移矩阵表明大部分地区的土壤侵蚀强度向低一级转移,全市的土壤侵蚀等级呈下降趋势. 对土壤侵蚀与坡度分析时,各侵蚀等级主要集中在较缓坡与陡坡间|且2015年各侵蚀等级在陡坡时迅速下降,这与推进≥25°坡耕地全部退耕还林政策相关|但坡陡谷深地带及城镇建设区周边区域仍是今后水土保持的工作重点.

关键词: 土壤侵蚀, RUSLE, 喀斯特, 盘州市

Abstract: To evaluate the soil erosion in Panzhou City, and to provide scientific basis for soil erosion control and land use decision. Based on GIS and modified RUSLE model, the daily rainfall of 12mm and 30mm for the erosive precipitation from the value of the use of 2000 to 2015, Panzhou City, NDVI, DEM, daily rainfall, soil and land use data to calculate the soil Erosion modulus. In the karst area, the traditional method will overestimate the total amount of soil erosion, so the improved rainfall erosivity is more in line with the local situation. The average erosion modulus in 2000 is 67.97t ha^-1yr^-1 and 23.33 in 2015 t ha^-1yr^-1| soil erosion intensity grade transfer matrix shows that most of the soil erosion intensity to a lower level of transfer, the city's soil erosion grade showed a downward trend. In the analysis of soil erosion and slope, the erosion grade is mainly concentrated in the gentle slope and the steep slope| and in 2015 the erosion rate in the steep slope of the rapid decline, which in recent years to promote ≥25° slope of all the policy of returning farmland to forest| But the slope steep valley deep area and the surrounding area of urban construction area is still the focus of future soil and water conservation.

Key words: soil erosion, RUSLE, karst, Panzhou

中图分类号:

S157.1

胡先培, 钱庆欢, 郭程程. 基于RUSLE模型的喀斯特地区土壤侵蚀动态变化研究——以盘州市为例[J]. 曲靖师范学院学报, 2018, 37(3): 71-77.

Hu Xianpei, Qian Qinghuan, Guo Chengcheng. Study on dynamic change of soil erosion in Karst region based on RUSLE model——Taking Panzhou City as an Example[J]. JOURNAL OF QUJING NORMAL UNIVERSITY, 2018, 37(3): 71-77.

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基于RUSLE模型的喀斯特地区土壤侵蚀动态变化研究——以盘州市为例

Study on dynamic change of soil erosion in Karst region based on RUSLE model——Taking Panzhou City as an Example

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