Impact of Human Activities on Hydrologic Simulations in the Huaihe River Basin
Abstract
Water supply and management projects including more than 5700 reservoirs and 5000 sluice gates have been operating for the growing need of water supplies for domestic, agricultural and industrial uses in the Huaihe River basin. Extreme flood and drought events occur more frequently due to the present global climate changes, which bring new difficulties in the hydrologic simulation of various hydrologic processes in the region. In this study, a long-term continuous hydrologic simulation (1980-2006) was conducted with a coupled land surface / hydrologic model in the basin in which the dynamics of vegetation, snow, soil moisture, groundwater, terrestrial hydrology, and channel(lake) / groundwater interaction were integrated into the coupled model system. Simulated hydrographs compared well with the observed at the basin outlet in 1980s. Continuous heavy flood and drought years have occurred alternately in the Huaihe River basin since 1990s; among which streamflows were over- estimated for the dry years and simulations for the flood years were reasonable. Massive water supply emerged due to increasing industrial activities and well developed water projects at that time, which altered the local natural hydrologic cycle. The simulated results were consistent with the adjusted observed hydrographs by the annual water supply, which showed that human activities have obviously affected the natural surface rainfall-runoff process, especially in dry years. It becomes an urgent issue to integrate human activities in the hydrologic simulation.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2008
- Bibcode:
- 2008AGUFM.H51G0945Y
- Keywords:
-
- 1834 Human impacts;
- 1836 Hydrological cycles and budgets (1218;
- 1655);
- 1843 Land/atmosphere interactions (1218;
- 1631;
- 3322);
- 1847 Modeling