%0 Journal Article
%T Impacts of Re-vegetation on Water Cycle in A Small Watershed of the Loess Plateau<br>黄土高原植被重建对小流域水循环的影响
%A WANG Hong-shan
%A HUANG Ming-bin
%A ZHANG Lu
%A <br>王红闪
%A 黄明斌
%A 张橹
%J 自然资源学报
%D 2004
%I 
%X Soil erosion results in soil degradation, pollutes water resource, blocks riverways and ditches, and imperils eco-environmental construction in Northwest China, especially in the gully region of the Loess Plateau.Re-vegetation is an effective method to reduce soil and water loss and improve eco-environment in the Loess Plateau.Therefore,the impacts of re-vegetation on water cycle have been one of the key issues in eco-environmental study in the loess region.Using a paired watershed approach,the impacts of re -vegetation on water cycle was studied in a watershed on the Loess Plateau during the period of 1956 to 2000.Deciduous trees,including locust (locusta L.),apricot (praecox L.)and elm (ulmus L.),were planted on a watershed with treated area exceeding 80% ,while a natural grassland watershed remained unchanged.The cumulative runoff yield in the treated watershed was reduced by 37% as a result of afforestation in 44 years.During the first 15-20 years,annual runoff reduction increased with the increase of the age of the trees planted and it didn't change much during the next 24-30 years. Reduction in monthly runoff occurred mainly from June to September.Compared with the natural grassland watershed,cumulative reduction of volumetric water content was about 222mm as a result of afforestation at a rate of 5mm per year.The cumulative evapotranspiration in treated watershed comparatively increased by 620mm at a rate of 14mm per year,which will cause soil desiccation.
%K re-vegetation
%K paired watersheds
%K runoff
%K the Loess Plateau<br>植被重建
%K 对比流域
%K 地表径流
%K 黄土高原
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=4DCB9A3AF3395AF0101DE5302EF3C300&aid=6A12CC672DC2AEC6&yid=D0E58B75BFD8E51C&vid=2A8D03AD8076A2E3&iid=38B194292C032A66&sid=A04F01817ECB9A48&eid=406BF8ED3BCE1927&journal_id=1000-3037&journal_name=自然资源学报&referenced_num=11&reference_num=16