THE ECOLOGICAL HYDROLOGICAL INFLUENCE OF THEGEZHOU-DAM ON THE SPAWN-SITE OF ACIPENSER SINENSIS

摘要

This paper first analyzes the influence of the hydrological factors on the AcipenserrnSinensis’ spawn through the analysis of about 10 years hydrological data before the building ofrnGeZhou-Dam, then it has gathered a series of hydrologic data and the spawning data of AcipenserrnSinensis (1983-2004). Based on a systematic analysis of the level-flux hydrograph inrnSeptember-November yearly (Acipenser Sinensis spawn period) at Spawn-site of AcipenserrnSinensis lower the Gezhou-Dam, plot the relevant graphs of the flux-time curve and the flux-timerncurve, and ascertain primarily the ecological flux, ecological velocity of flow and the ecologicalrnwater level and the relevant limens. This research provide the design ecological flux, ecologicalrnvelocity of flow and the ecological depth of the water for control of three Gorges project, also havernthe important theoretical significance and the value of practicality application.