Integrated factor analysis of water level variation in geographically isolated ponds
Integrated factor analysis of water level variation in geographically isolated ponds
复制标题
地理孤立池塘水位变化的综合因素分析
DOI：
10.1007/s11356-020-09959-8
复制
发表时间：
2020
影响因子：
5.8
通讯作者：
Wang Cheng
中科院分区：
文献类型：
--
作者：
Li Yufeng;Wu Yuqin;Wright Alan;Xu Jiayi;Liu Hongyu;Wang Gang;Wang Cheng
地理上孤立的小池塘提供了多种生态功能和服务，但地下水位的波动改变了这些服务的规模。了解流域地表水位的时空变化及其空间变异性，对小池塘的恢复和保护至关重要。采用双权空间一致性检验对50个池塘和水文连通性模型的地表水位季节性变化进行量化，并将土地利用指标、地形特征和地下水灌溉需求引入模型，以确定影响因素。水位变化的空间差异在稻季大于麦季，地下水位在麦季上升，在稻季下降。连续径流与完整的表面水文连通的池塘，这是密切相关的降水，只发生一次在研究期间。水位动态在很大程度上与地表水文连通性无关，但与流域和池塘大小有关。通过评估灌溉需水量，灌溉是影响池塘地下水位变化的主要人为管理因素。地下水也丰富了池塘水位变化的影响因子，这些结果将为改善水资源管理和池塘保护目的提供支持。
Small geographically isolated ponds provide a multitude of ecological functions and services, but water table fluctuations alter the magnitude of these services. Understanding temporal and spatial changes of surface water levels in the watershed, and their spatial variability, is critical for restoration and protection of small ponds. A biweight spatial consistency test was employed to quantify the seasonal variability of surface water tables for 50 ponds and hydrological connectivity models, and land use metrics, topographic characteristics, and irrigation needs, for groundwater, were introduced into the model to identify influencing factors. The spatial difference of water level changes in the rice season was greater than the wheat season while water table increased in the wheat season and declined in the rice season. Continuous runoff with complete surface hydrological connectivity of ponds, which was strongly related to precipitation, occurred only one time during the study period. Water level dynamics were largely uncorrelated to surface hydrological connectivity but were linked to watershed and pond size. By evaluating irrigation water requirements, irrigation was a primary human management factor affecting the water table changes in ponds. Groundwater also enriched influence factors that estimated water level variation in ponds, and these results will provide support for improved water resource management and ponds protection purposes.