Study On Hydrological Process Modeling Of Typical Small Scale Basin In Longgang Volcanic Clusters Region Of Changbai Mountain

The study area locates in the upstream of Houhe River basin, whichis also the Longgang Volcanic Clusters Region of Changbai Mountain. Thebasin area is approximately130km2, including2rivers named Jincuan Riverand Nanhe River. The basin within the crater lake and fen peat wetlandsdotted, is a typical representative water source region of the ChangbaiMountain, as well as one important source of the Second Songhua River.The basin include forests, wetlands, rivers, crater lake and other naturaland geographical units, with the development of the tourism economy andthe increase of human activities in recent years, the status of land usechanges speed up, and the natural ecosystems in the basin disturbed byhuman growing, such as a clear downward trend of forest coverage and itsquality. Affected by vegetation and land use changes, eco-hydrologicalprocesses of the watershed ecosystem followed, thereby affecting allaspects of the water balance, vegetation moisture condition and riverrunoff. Therefore, to carry out the changes in the hydrological effectsmake considerable significance for the wise implementation of river basinwater resources management.A distributed hydrological model MIKE SHE was used to simulate research areahydrological processes. Quantitative calculation of detailed hydrological processes onthe time series within the watershed ecosystem, include water infiltration,evapotranspiration, unsaturated zone soil moisture changes, the water level changesand water movement of the saturated zone, overland flow, base flow, runoff, soilmoisture content changes. The model uses the measured Houhe runoff daily data ofthe2011vegetation growing season for calibration. The calibration results show thatcorrelation between the simulations and measured is significant, with correction factorof0.9, and efficiency coefficient is high, with the Nash-Sutcliffe Coefficient of79%.Accordingly, the model is applicable to the quantitative modeling watershedeco-hydrological processes in the Changbai Mountain volcano cluster region, and isavailable to provide reliable scientific basis for management of basin water resourcesand flood risk warning in mountainous areas.