Abstract
The hydrology response was studied considering the established fact of land use change in Dapoling basin. The whole period was divided into two (1965–1985 and 1986–2012) according to the major land use and land cover change in this region. Xinanjiang model was used to simulate discharge data in the two periods. The hydrologic response to the change could be evaluated by inspecting the response of model parameters and flood elements. The results show that the lag time varied, and the hydrologic elements including the mean runoff depth, flood peak and kurtosis coefficient varied with the rainfall depth. This result is significant for studying the response of runoff characteristic from land use and land cover change.
Highlights
Land use and land cover patterns change dramatically with the expansion of human activities, the impact of which on environment and sustainable development has attracted widespread attention [1,2,3,4].The mechanism of hydrologic process is complex, which relates to the spatial and temporal distribution of basin physiographic factors, and to the basin’s underlying surface conditions.Vörösmarty [2] showed that land use change and climate change are two factors that impact hydrology.On a long time scale, climate change impacts more than land use change
The mechanism of how land use change influences the hydrology has been widely discussed in other studies, the object of this research was to test the hydrology response based on the fact of land use change and provide guidance for flood forecasting
The parameters before/after land use change are shown in Tables 6 and 7
Summary
Land use and land cover patterns change dramatically with the expansion of human activities, the impact of which on environment and sustainable development has attracted widespread attention [1,2,3,4]. It is well documented that land use change can have a significant effect on river basin hydrology, which is mainly reflected on the change of the flood volume [1,9], peak flow discharge [10,13], flood frequency [19]. More understanding of the influence of land use change on lag time can provide guiding significance for flood forecasting and water resources management of the basin. The mechanism of how land use change influences the hydrology has been widely discussed in other studies, the object of this research was to test the hydrology response based on the fact of land use change and provide guidance for flood forecasting.
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