摘要
西南高山峡谷区曾是中国水土流失最严重的区域之一,近20年来这一区域却是中国水土流失治理成效最为显著的区域。然而,生态政策对西南高山峡谷区水土保持能力的贡献还缺少研究。基于中国防止水土流失的土壤保持能力数据集,分析了西南高山峡谷区2000-2018年水土保持能力的分布以及时空变化特征,揭示了西南高山峡谷区不同地带水土保持能力变化的影响因素。结果表明:西南高山峡谷区是中国水土保持能力变化最为明显的区域,整体上呈现极为明显的净增强趋势,且以四川省最为明显,而云南省的大理白族自治州、怒江傈僳族自治州的部分区县以及丽江市部分区县的水土保持能力降低最为明显。西南高山峡谷区水土保持能力变化具有明显的空间聚集效应,且水土保持能力增强的空间聚集程度高于水土保持能力降低的空间聚集程度。生态政策对该区域水土保持能力变化的影响程度最强,自然条件因素的海拔、坡度、气温、降水、归一化植被指数(Normalized Difference Vegetation Index,NDVI),社会经济因素的GDP和夜间灯光也是影响西南高山峡谷区水土保持能力变化的关键驱动因素。
The southwest alpine-canyon area was one of the most severe regions of soil erosion in China,but in the past 20 years,it has become the region with the most significant achievements in soil erosion control.However,there is a lack of research on the contribution of ecological policies to the soil and water conservation capacity in southwest alpine-canyon area.This paper,based on the dataset of soil and water conservation capacity for preventing soil erosion,analyzes the distribution and spatiotemporal variation characteristics of soil and water conservation capacity in southwest alpine-canyon area from 2000 to 2018.It reveals the influencing factors of changes in soil and water conservation capacity across different zones in southwest alpine-canyon area.The results show that the change of soil and water conservation capacity was the most obvious in the alpine and canyon regions in southwest alpine-canyon area,and the overall trend of net increase was extremely obvious,and the increase was the most obvious in Sichuan province,which was a typical region where the soil and water loss control had achieved obvious results.In Yunnan Province,Dali Bai Autonomous Prefecture,some districts and counties of Nujiang Lisu Autonomous Prefecture and some districts and counties of Lijiang City had the most obvious decrease in soil and water conservation capacity.The change of soil and water conservation capacity in southwest alpine canyon region had obvious spatial aggregation effect,and the spatial aggregation degree of enhanced soil and water conservation capacity was higher than that of reduced soil and water conservation capacity.Ecological policies had the strongest influence on the change of soil and water conservation capacity in this area,and the elevation,slope,temperature,precipitation of natural conditions,NDVI,GDP of social and economic factors and night light were also the key driving factors affecting the change of soil and water conservation capacity in southwest alpine-canyon area.
作者
黄梦思
阎建忠
吴雅
周洪
HUANG Mengsi;YAN Jianzhong;WU Ya;ZHOU Hong(College of Resources and Environment,Southwest University,Chongqing 400715,China)
出处
《西南大学学报(自然科学版)》
北大核心
2025年第11期121-135,共15页
Journal of Southwest University(Natural Science Edition)
基金
国家重点研发计划项目(2022YFF1302904-04)。
关键词
西南高山峡谷区
水土保持
冷热点分析
生态政策
驱动机制
southwest alpine canyon areas
soil and water conservation
hot/cold spot analysis
ecological policy
driving mechanism
