来宾县农业干旱成因的分析

Origin of Agricultural Drought in Laibin County,Guangxi,China

关键词:  岩溶  干旱成因  来宾县

Key words:  karst  origin of drought  Laibin county

摘要:

导致来宾发生区域干旱的原因有四种:季风气候,岩溶环境,生态恶化,灌溉系统功能低下.前两种属先天自然环境不良,后两种与人类活动不当有关.四种原因迭加的结果使来宾县成为广西区干旱特别严重的县份.其中最根本的地域性因素是岩溶环境.来宾干旱属典型的岩溶干旱.来宾县位于桂中平原;大江大河(红水河)水资源丰富,是优先开发对象,同时应考虑岩溶特点,建立综合治旱技术体系.

Abstract:

Monsoon climate,karst environment,regional deforestation and ineffective irrigation system have been considered four reasons to be responsible for the regional drought in Laibin county.The former two are of nature and the Lattet ones result from improper human activities.Acting jointly,they have made Laibin be one of the most drought counties in Guangxi and even in China.Among the four reasong karst environment is a key one.Drought in Laibin can be taken for classic karstic one.A comprehensive system for drought management is to be suggested,in which development of water resources rivers such as Hongshuihe should be preferable.