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林业资源管理 ›› 2018›› Issue (6): 90-98.doi: 10.13466/j.cnki.lyzygl.2018.06.015

• 科学研究 • 上一篇    下一篇

基于GIS的滇南踏青河源头小流域近20年土壤侵蚀变化

苏布德1(), 赵洋毅1,2(), 王克勤1,2, 段旭1,2, 方斌3   

  1. 1.西南林业大学 生态与水土保持学院,昆明 650224
    2.国家林业和草原局云南玉溪森林生态系统国家定位观测研究站,昆明 650224
    3.云南秀川环境工程技术有限公司,昆明 650224
  • 收稿日期:2018-09-25 修回日期:2018-12-07 出版日期:2018-12-28 发布日期:2020-09-27
  • 通讯作者: 赵洋毅
  • 作者简介:苏布德(1994-),女,内蒙古人,在读硕士,主要从事水土保持研究。Email: 2855865449@qq.com
  • 基金资助:
    云南省重点研发计划项目(2018BB018);国家自然科学基金项目(31760149);国家自然科学基金项目(31860235);国家林业和草原局林业科技创新平台运行补助项目(2018-LYPT-DW-162);云南省自然生态监测网络监测项目(2018-YN-12)

Changes of Soil Erosion in the Small Watershed of the Taqing River in Southern Yunnan Province in Recent 20 Years Based on GIS

SU Bude1(), ZHAO Yangyi1,2(), WANG Keqin1,2, DUAN Xu1,2, FANG Bin3   

  1. 1. College of Ecology & Soil and Water Conservation,Southwest Forestry University,Kunming 650224,China
    2. Yuxi Forest Ecosystem Research Station,National Forestry and Grassland Administration,Kunming 650224,China
    3. Yunnan Xiuchuan Environmental Engineering Technique Co,Ltd,Kunming 650021,China
  • Received:2018-09-25 Revised:2018-12-07 Online:2018-12-28 Published:2020-09-27
  • Contact: ZHAO Yangyi

摘要:

基于地理信息系统技术,以小流域2001年、2007年和2016年Quickbird影像数据为基础,利用RUSLE模型计算了2001年、2007年和2016年的土壤侵蚀量,分析了不同土地利用类型下土壤侵蚀变化。结果表明:踏青河左之河流域土壤侵蚀强度以轻度和中度侵蚀为主,占总面积的79.44%~80.55%;茶地面积持续增长,分别为137.92,146.46,180.84hm2;林地占小流域面积的60.04%~67.17%;茶地和耕地陡坡种植面积逐年增加,不合理开垦,致使流域内土壤侵蚀加剧。2001—2016年间土壤侵蚀量的分别为44 133.38,46 600.56,44 856.95t/a。土壤侵蚀综合指数变化幅度在5%左右。土地利用变化与土壤侵蚀之间为耦合关系,研究区茶地变化对较耕地对流域内土壤侵蚀影响小,需加强流域内耕地相应的水土保持措施。

关键词: 土壤侵蚀, 地理信息系统, 滇南, 小流域, RUSLE模型

Abstract:

Based on the geographic information system technology and the 2001,2007 and 2016 QuickBird image data of the small watershed,the RUSLE model was used to calculate the amount of soil erosion in 2001,2007 and 2016.Analysis was done on soil erosion changes under different land use types.The results show that the soil erosion intensity in the left river basin of the Taqing River is mild and moderate,accounting for 79.44%~80.55% of the total area.The area of tea land continued to increase,which was 137.92,146.46,180.84 hm2 respectively.The forest land accounts for 60.04%~67.17% of the total area.The planting area of tea fields and cultivated land steep slopes has increased year by year and unreasonable reclamation has caused soil erosion in the basin to intensify.The difference in soil erosion between 2001 and 2016 was 44 133.38,46 600.56 and 44 856.95t/a,respectively.The soil erosion comprehensive index changes by about 5%.There is a coupling relationship between land use change and soil erosion.The change of tea land in the study area has little effect on the soil erosion in the basin.It is necessary to strengthen the corresponding soil and water conservation measures for the cultivated land in the basin.

Key words: soil erosion, geographic information system, southern Yunnan, small watershed, RUSLE model

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