珠江流域土地石漠化和河流泥沙含量的动态变化  

Dynamic Change of Land Rocky Desertification and River Sediment Content in Pearl River Basin

作　　者：吴协保 黄俊威 宁小斌 宋进春 吴照柏 但新球 王昊琼 卢立 Wu Xiebao;Huang Junwei;Ning Xiaobin;Song Jinchun;Wu Zhaobai;Dan Xingqiu;Wang Haoqiong;Lu Li(Central South Inventory and Planning Institute of National Forestry and Grassland Administration,Changsha,Hu’nan 410014,China;Rocky Desertification Montoring Center of National Forestry and Grassland Administration,Changsha,Hu’nan 410014,China)

机构地区：[1]国家林业和草原局中南调查规划设计院,湖南长沙410014 [2]国家林业和草原局石漠化监测中心,湖南长沙410014

出　　处：《水土保持通报》2021年第3期22-30,共9页Bulletin of Soil and Water Conservation

基　　金：国家重点研发计划“喀斯特峰丛洼地石漠化综合治理与生态服务功能提升技术研究示范”(2016YFC0502400)。

摘　　要：[目的]研究珠江流域岩溶石漠化土地与河流泥沙含量动态变化及相互关系,以期科学评价珠江流域石漠化生态修复成效。[方法]基于2018年发布的第3次石漠化监测成果数据《中国河流泥沙公报》数据,运用数理统计、图表功能和相关性分析,研究石漠化土地与河流泥沙含量动态变化关系。[结果](1)珠江流域石漠化土地面积占全国34.1%。21世纪以来,区域石漠化土地面积呈现持续减少,程度减轻,生态环境状况明显好转;(2)2001-2018年主要水文站年输沙量年际变动规律不明显,河流年输沙量、年平均含沙量、多年平均输沙模数总体呈现降低趋势。[结论]珠江流域石漠化土地面积与河流泥沙含量间存在指数正相关性;河流输沙量、石漠化土地面积与植被综合盖度呈指数负相关关系,与耕地面积呈指数正相关关系。[Objective]In order to scientifically evaluate the effect of ecological restoration of rocky desertification land,the dynamic changes and interrelationships of karst rocky desertification land and river sediment content in the Pearl River basin were studied.[Methods]Based on the third rocky desertification monitoring result data which were issued in 2018 and the 2000—2018“China River Sediment Bulletin”data,mathematical statistics,chart functions,and correlation analysis were used to study dynamic changes in and interrelationships of rocky desertification land and river sediment content.[Results]①The area of rocky desertification land in the Pearl River basin accounted for 34.1%of the country.Since the beginning of the 21st century,the area of regional rocky desertification land has continually decreased,the degree has been reduced,and the ecological environment has improved significantly.②From 2001 to 2018,the inter-annual variation of the annual sediment transport at major hydrological stations was not obvious.The annual sediment transport,annual average sediment concentration,and multi-year average sediment transport modulus of rivers generally showed a downward trend.[Conclusion]There is an exponential positive correlation between the rocky desertification land area and river sediment content in the Pearl River basin.The amount of sediment transported by rivers and the area of rocky desertification land are exponentially negatively correlated with the comprehensive vegetation coverage and exponentially positively correlated with the area of arable land.

关 键 词：珠江流域 石漠化土地 石漠化程度 泥沙含量 动态变化 

分 类 号：X171.4[环境科学与工程—环境科学] X43