Responses of intra-annual runoff to forest recovery patterns in subtropical China  

作　　者：Zhipeng Xu Wenfei Liu Qiang Li Jianping Wu Honglang Duan Guomin Huang Yizao Ge 

机构地区：[1]Jiangxi Province Key Laboratory for Restoration of Degraded Ecosystems&Watershed Ecohydrology,Nanchang Institute of Technology,Nanchang 330099,People’s Republic of China [2]Department of Civil Engineering,University of Victoria,3800 Finnerty Road,Victoria,BC V8P 5C2,Canada [3]Yunnan Key Laboratory of Plant Reproductive Adaption and Evolutionary Ecology,Yunnan University,Kunming 650500,People’s Republic of China

出　　处：《Journal of Forestry Research》2021年第4期1479-1488,共10页林业研究（英文版）

基　　金：supported financially by the Education Department of Jiangxi Provincial(GJJ151141);National Natural Science Foundation of China(31660234);Jiangxi Province Department of Science and Technology(20161BBH80049);the Outstanding Young Scholar of Jiangxi Science and Technology Innovation(20192BCBL23016)。

摘　　要：Forest recovery plays a critical role in regulating eco-hydrological processes in forested watersheds.However,characteristics of the intra-annual runoff variation associated with different forest recovery patterns remain poorly understood.In this study,three forest change periods were identified,the baseline period(1961-1985),reforestation period(1986-2000)and fruit tree planting period(2001-2016).We selected the magnitude of seasonal runoff(wet and dry seasons)and distribution characteristics,i.e.,non-uniformity coefficient(C_(v)),complete accommodation coefficient(C_(r)),concentration ratio(C_(n)),concentration period(C_(d)),absolute variation ratio(ΔR)and relative variation ratio(C_(max)).The pair-wise approach evaluated the intra-annual runoff variation characteristics between forest change periods.Results indicate that reforestation decreased wet season runoff and increased dry season runoff.In contrast,fruit tree planting increased wet season runoff and had no significant effect on dry season runoff.For intra-annual runoff distribution characteristics,reforestation significantly reduced the C_(v),C_(r),C_(n)and C_(max).Distribution of the intra-annual runoff in the fruit tree planting period was not significantly different from the baseline.We concluded that reforestation reduced the occurance of extreme water conditions in wet and dry seasons and effectively increased the stability of the intra-annual runoff.In contrast,fruit tree planting increased instability and fluctuation of the intra-annual runoff after reforestation.The characteristics of the intra-annual runoff to fruit tree planting was similar to those of the baseline.Therefore,adopting fruit tree planting practices to regulate intra-annual runoff characteristics may not be a practical approach,and impacts of different reforestation practices should be ascertained in our study region.The implications of this study should guide regional land-water management,and this study adds to the understanding of the impacts gained in forest cover on hydrolo

关 键 词：Intra-annual runoff variation Seasonal runoff Forest recovery REFORESTATION Fruit tree planting 

分 类 号：S718.5[农业科学—林学]