摘要
贵州省茂兰国家级自然保护区现存有全球同纬度面积最大的喀斯特原生森林。研究证实,其森林水文效应较为明显。通过对该区岩溶水实时动态监测及氘氧同位素化学分析,认为该区喀斯特森林水文效应主要的表现方式是雨季的激发降水及旱季生态需水消耗。2010年位于原生森林区板寨站实测降水量高达1 710.0mm,而位于森林外围区的尧排站实测降水量仅为1 066.5mm。森林激发降水主要来自其对表层带岩溶水的蒸发蒸腾而产生的水汽。森林水文效应使该区表层带岩溶水的循环周期季节变化非常明显,丰水季节超过了3个月,而枯水季节则约为2个月,说明该区表层带岩溶水受森林生长周期的影响较为明显。
The forest at Maolan National Nature Reserve of Guizhou Province（MNNRG） is the largest karst primal forest area along similar latitude in the world and of great hydrological significance to the region.Its major hydrological effect,according to the tracer technology of hydrogen and oxygen stable isotope,is to increase precipitation in summer and to supply ecological water need in winter.In 2010,the precipitation was 1 710.0 mm within the reserve area and 1 066.5 mm outside.The increased rainfall in the forest mainly came from evaportranspiration of epi-karst water.The epi-karst water cycle demonstrated distinct seasonal variations including a three-month wet season and two-month dry season,suggesting the epi-karst hydrodynamics might be affected significantly by forest growth cycle.
出处
《水土保持通报》
CSCD
北大核心
2012年第6期47-50,共4页
Bulletin of Soil and Water Conservation
基金
中国地质调查局工作项目"中国岩溶碳汇动态评价"(1212011087122)
关键词
森林水文效应
监测
稳定同位素
forest hydrological effect
monitoring
stable isotope
