Evaluation of the Flow Regime in the Lower Yellow River Delta, China
In the Yellow River Delta hydrodynamics plays a prominent role. The decreasing Yellow River discharge and the altered flow regime during the last decades are a most likely factor responsible for problems related to ecosystem deterioration, habitat evanescence, siltation of the river channel, groundwater depletion, and soil salinity increase. This paper presents the research exploring the flow variability and alteration of flow regime in the Yellow River Delta. An attempt is made to suggest a possible approach by developing a synthetic flow regime, which adequately resembles the flow variability of the natural river state. Statistical techniques were applied to analyse the hydrological data at Lijin station in the Yellow River Delta, while Richter s Method was used to confirm that the hydrological records at Lijin clearly exhibited non stationary behaviour. Three distinct periods could be distinguished in terms of seasonal pattern, frequency of hydrologic events change, timing of extreme flows, and flow dispersion profile. A Flow Duration Curve approach was adjusted for temporal interpolation in order to generate a preferred flow, based on the assumption that the same site is likely to experience similar flow variability. It is shown that this approach can be applied to generate synthetic flow conditions which have similar variability as the reference flow, and could be used for future water management in the Yellow River Delta.
Yellow River Delta alteration of flow regime daily flow generation temporal interpolation flow variability restoration
Dong Wu Tong Guoqing Arthur E. Mynett
Information Center, Yellow River Conservancy Commission, Zhengzhou, 450003, China Yellow River Shandong Bureau, YRCC, Jian, 250013, China UNESCO - IHE Institute for Water Education, P. O. Box 3015, 2601 DA Delft, the Netherlands Delft Uni
国际会议
郑州
英文
608-616
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）