Spatial Patterns in Baseflow Mean Response Time across a Watershed in the Loess Plateau: Linkage with Land-Use Types
Spatial Patterns in Baseflow Mean Response Time across a Watershed in the Loess Plateau: Linkage with Land-Use Types
复制标题
基流的空间模式意味着整个森林流域的响应时间：与土地利用类型的联系。
DOI：
10.1093/forsci/fxz084
复制
发表时间：
2020-06-01
期刊：
影响因子：
1.4
通讯作者：
Han, Shi-jie
中科院分区：
文献类型：
--
作者：
Huang, Xu-dong;Wang, Dong;Han, Shi-jie
了解流域土地利用类型与基流平均响应时间的关系，对于探讨流域基流过程的响应机制具有重要意义。使用瞬时单位线确定BMRT。瞬时单位线参数由自相关函数估计。通过水文模型和偏最小二乘回归分析，评价了不同土地利用类型在确定BMRT动态中的相对重要性。我们的研究表明，城市地区对BMRT的影响大于森林和农业用地的影响。这可能是因为城市截流不透水区可能会在短时间内阻碍基流的产生。在坡度较陡的地区，农地的影响大于森林，但在平原较多的地区，农地的影响小于森林，这反映了不同地形的林地和农地阻碍地表径流的能力不同。BMRT的变化与流域的土地利用密切相关。总体而言，我们的研究提供了深入了解BMRT和流域土地利用类型的主导因素，可持续水资源利用规划和流域生态保护。
Understanding the relation between land-use types and baseflow mean response time (BMRT) is important to explore the response mechanism of baseflow processes in watersheds. BMRT was determined using an instantaneous unit hydrograph. The instantaneous unit hydrograph parameters were estimated by autocorrelation functions. The relative importance of land-use types in determining BMRT dynamics was assessed by hydrological model and partial least-squares regression. Our study suggests greater effects of urban area on BMRT than the effects of forest and agricultural land. This may be because the urban interception impervious area may impede baseflow generation over a short timescale. The effects of agricultural land are greater than those of forest in areas with steeper hillslopes, but lower than those of the forest in areas with more plains, reflecting the varied ability of forest and agricultural lands with different topography to hinder overland flow. Variations of BMRT are strongly linked to land use in the watershed. Overall, our study provides insight into the BMRT and dominant factors of land-use types in watersheds, planning of sustainable water resource use, and ecological protection in watersheds.