摘要
干旱是全球性普遍发生的一种自然现象,而喀斯特流域水文干旱不能简单归因于"气候异常、降水量减少"。论文将利用面向对象分类技术,提取土壤类型、土壤相对覆盖度、土壤相对粗糙度、土壤相对湿度的遥感信息;从土壤系统结构与土壤系统功能的关系角度,分析土壤单因素单因子、单因素双因子耦合以及多因素耦合对流域水文干旱影响。研究表明:①土壤单因素单因子对流域水文干旱影响,即是土壤通道对降雨的土壤径流影响的体现;②土壤单因素双因子耦合对流域水文干旱影响,取决于其单因子对流域水文干旱影响的程度;③土壤多因素耦合对流域水文干旱影响,即是土壤通道耦合对降雨的土壤径流影响的综合体现。因此,通过论文的研究,从土壤系统结构的角度,揭示了流域水文干旱的驱动机制,为喀斯特地区水资源的利用提供了理论基础。
Drought is a global widespread occurring natural phenomenon, but karst ba- sins hydrological drought can not be simply due to the climate anomalied, the precipita- tion reduced. This paper will extract remote sensing information of the soil type, the soil relative coverage, the soil relative roughness, and the soil relative humidity through us- ing the object-oriented classification techniques. From the relationship between the soil systematic structure and the soil systematic function, this paper analyzes the impacts of the single-factor of the soil single factor, two-factor coupled of the soil single factor, and the soil multi-factors coupled to hydrological droughts. Studies have shown that： 1） The impacts of the single-factor of soil single factor on hydrological droughts are the re- flections of the impacts of the soil channel on the soil runoff of precipitations. 2）The im- pact of soil single factor on hydrological droughts is the combined result of the full-fac- tor of soil single factor influences the hydrological drought. Descending order （single factor） of the four soil factors affects the hydrological droughts, soil relative roughness （0.968） 〉soil relative coverage （0.560） 〉 soil relative humidity （0.558） 〉soil types （0.464）. 3）The impacts of the multi-factor coupled on hydrological droughts are the com- prehensive reflections of the impact of the soil coupled-channel on the soil runoff of pre- cipitations. Descending order of the coupled-factors affectting the hydrological drought（two-factor coupled）： soil relative roughness^soil relative humidity （0.969） 〉soil relative coverage x soil relative humidity （0.560）〉soil types ~ soil relative coverage, soil types x soil relative humidity （0.464） 〉soil relative coverage x soil relative roughness （0.441）〉soil types × soil relative roughness （0.362）; the three-factor coupled： soil types × soil relative coverage×soil relative humidity （0.672）〉soil relative coverage×soil relative roughness × soil relative humidity （0.560） 〉soil types× soil relative roughness × soil relative humidity （0.533） 〉soil types× soil relative coverage xsoil relative roughness （0.456）; the four-factor coupled： soil types × soil relative coverage x soil relative roughness × soil rela- tive humidity （0.464）. Results of the study revealed the driving mechanism of hydrologi- cal droughts,and provides a theoretical foundation for the water resources using in karst regions.
出处
《自然资源学报》
CSSCI
CSCD
北大核心
2013年第10期1731-1742,共12页
Journal of Natural Resources
基金
贵州省水利厅自然科研基金(KT201105
KT201010
KT200802)
贵州省教育厅自然科研基金(黔教科2009(0039)
黔教科2006307)
贵州省科技厅自然科研基金(黔科合J字〔2010〕2026号
黔科合J字〔2013〕2008号)
