摘要
以川滇生态屏障区为研究对象,采用生态系统服务和交易的综合评估模型(Integrated Valuation of Ecosystem Services and Trade-offs,In VEST)对2000年、2010年、2015年和2020年的土壤侵蚀和土壤保持情况进行分析,并运用地理探测器探测土壤侵蚀的主控因子。结果表明:川滇生态屏障区不同年份的土壤侵蚀模数和土壤侵蚀总量呈先减少后增加的趋势。侵蚀强度以微度侵蚀为主,约占整个区域的85%,主要分布在川滇生态屏障区东部,轻度及以上侵蚀强度多分布于西部地区。不同年份的土壤保持模数分别为4.0×10^(3)、3.5×10^(3)、3.5×10^(3)、4.5×10^(3) t·km^(-2),土壤保持总量分别为9.6×10^(8)、8.3×10^(8)、8.2×10^(8)、1.1×10^(9) t。各影响因子对土壤侵蚀的影响程度从高到低依次为:土地利用类型、高程、植被覆盖度、土壤可蚀性因子、降雨侵蚀力因子、坡度,其中土地利用类型与土壤可蚀性因子的交互协同作用对土壤侵蚀的解释力最强。
【Objective】The Sichuan-Yunnan ecological barrier area is an important ecological function area in China.To reduce the increasing ecological degradation and soil erosion,it is important to research soil erosion and soil conservation functions.【Method】The Integrated Valuation of Ecosystem Services and Trade-offs(InVEST)model was used to characterize the spatial distribution of soil erosion and soil retention in 2000,2010,2015,and 2020.The GeoDetector was applied to detect the main controlling factors of soil erosion.【Result】The results showed that the soil erosion modulus and the total amount of soil erosion in the four phases showed a trend of decreasing and then increasing.The erosion intensity was dominated by mild erosion,accounting for about 85% of the whole area,and mainly distributed in the eastern part of the area.The light and more than light erosion intensity were mostly distributed in the western part.Soil conservation modulus in 2000,2010,2015,and 2020 were 4.0×10^(3),3.5×10^(3),3.5×10^(3),and 4.5×10^(3) t×km^(-2),respectively,and soil conservation amount were 9.6×10^(8),8.3×10^(8),8.2×10^(8),and 1.1×10^(9) t,respectively.The influence degree of each influencing factor on soil erosion in descending order was as follows:land use type,elevation,fractional vegetation cover,soil erodibility,erosivity,and slope.The interaction effects between factors on soil erosion were greater than that single factor,and the interaction between land use type and soil erodibility had the strongest effects on soil erosion.【Conclusion】Although soil erosion in the Sichuan-Yunnan ecological barrier area shows a worsening trend,soil conservation is gradually improving,and soil conservation is stronger than soil erosion,and overall,the Sichuan-Yunnan area is developing in a better direction.
作者
陶勤
王世航
王奇
刘峰
赵明松
徐胜祥
TAO Qin;WANG Shihang;WANG Qi;LIU Feng;ZHAO Mingsong;XU Shengxiang(Institute of Soil Science,Chinese Academy of Sciences,Nanjing 211135,China;School of Geomatics,Anhui University of Science and Technology,Huainan,Anhui 232001,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《土壤学报》
CAS
CSCD
北大核心
2024年第6期1548-1556,共9页
Acta Pedologica Sinica
基金
科技基础资源调查专项(2022FY100204)
国家自然科学基金项目(42271369)
安徽省自然科学基金项目(2208085MD88)资助。
