摘要
在青藏高原多年冻土区典型小流域内开展水量平衡试验,对降水量、植被截留、蒸散发、坡面径流、地下径流和活动层贮水量等要素进行了长期观测。水量平衡的研究表明:冻融过程对于土壤贮水量的影响很大,未退化、中度退化和严重退化的高寒草甸在5—6月,土壤水分由固态向液态转化,是活动层水分释放的过程,导致地下水位的抬升和春汛过程。9—10月是活动层的冻结阶段,液态水转化为固态水,处于积累状态。活动层的冻融过程使得多年冻土区的水量平衡规律和其他地区相比具有独特性,活动层冻融过程深刻影响着高寒地区水循环过程。
Water balance experiments were carried out in typical small watersheds in permafrost region of Qinghai-Tibet Plateau.Long-term observations were made on precipitation,vegetation interception,evapotranspiration,slope runoff,underground runoff and active layer water storage.The results showed that:The freezing and thawing process had a great impact on soil water storage.In undegraded,moderately degraded and seriously degraded alpine meadows,soil moisture changes from solid to liquid in May to June,which was the release process of active layer water,leading to the rise of groundwater level and spring flood process.From September to October is the freezing stage of the active layer,liquid water was transformed into solid water,in the state of accumulation.The freezing-thawing process of the active layer makes the water balance law in permafrost region unique compared with other regions.The freezing-thaw⁃ing process of the active layer profoundly affects the water cycle process in the alpine region.
作者
李春杰
LI Chunjie(School of Geography And Tourism,Nanyang Normal University,Nanyang Henan 473061)
出处
《河南科技》
2021年第36期121-124,共4页
Henan Science and Technology
基金
南阳师范学院专项项目(ZX2015088)。
关键词
活动层
多年冻土
水量平衡
固-液转化
active layer
permafrost
water balance
solid-liquid conversion
