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Li S.Y.,Tianjin University | Tao J.H.,Tianjin University | Yu L.,Haihe River Water Conservancy Commission
Advanced Materials Research | Year: 2013

Drinking water sources play an important role in assurance of life safety, normal production and social stability. In this paper, a real-time remote water quality monitoring and early warning system has been developed. The paper concentrates on the system architecture and key techniques of the real-time water quality monitoring and early warning. The implementation of the system by advanced water quality sensor techniques, wireless transmission, databases and water quality modeling is retraced in detail. It can be applied to the real-time remote monitoring of water quality and decision support for water pollution incidents. © (2013) Trans Tech Publications, Switzerland. Source


Liu Q.,Chinese Ministry of Water Resources | Qin Y.,Chinese Ministry of Water Resources | Zhang Y.,Haihe River Water Conservancy Commission | Li Z.,Chinese Ministry of Water Resources
Natural Hazards | Year: 2015

A coupled 1D–2D hydrodynamic model linking the channel and flood detention basin for flood simulation with complex topography and irregular boundary was presented in this paper. The 1D Saint-Venant equations were used for governing flows in channel, and the four-point implicit Preissmann scheme was used for discretization. To simulate floods in flood detention basin, the 2D shallow equations were adopted as governing equations, and a well-balanced, unstructured finite-volume method was proposed for the numerical resolution. The 2D model is based on a new formulation of the classical shallow water equations in hyperbolic conservation form. The numerical fluxes are computed by HLLC algorithm, and the MUSCL–Hancock predictor–corrector scheme is used to achieve high-accuracy and high-resolution results. A simple and efficient method was proposed to reflect the coupled hydraulic connection between the channel and the flood detention basin. The novelties of the proposed model include (1) a robust method for wetting/drying treatment and (2) an efficient way to link the 1D and 2D models. The 1D, 2D, and coupled models are all tested through some benchmark cases, and numerical results validated the accuracy of the models. Furthermore, the coupled 1D–2D model was used for a real flood simulation in Jiakouwa flood detention basin, China. The flood-risk information including flood arrival time and maximal water depth was mapped using GIS. Those flood-risk maps can be used as an important decision-making basis of flood control and rescue for the flood control departments at all levels. © 2014, Springer Science+Business Media Dordrecht. Source


Zhang J.,Zhengzhou University | Ding Z.,Haihe River Water Conservancy Commission | You J.,China Institute of Water Resources and Hydropower Research
Journal of Hydrology and Hydromechanics | Year: 2014

River runoff and sediment transport are two related random hydrologic variables. The traditional statistical analysis method usually requires those two variables to be linearly correlated, and also have an identical marginal distribution. Therefore, it is difficult to know exactly the characteristics of the runoff and sediment in reality. For this reason, copulas are applied to construct the joint probability distribution of runoff and sediment in this article. The risk of synchronous-asynchronous encounter probability of annual rich-poor runoff and sediment is also studied. At last, the characteristics of annual runoff and sediment with multi-time scales in its joint probability distribution space are simulated by empirical mode decomposition method. The results show that the copula function can simulate the joint probability distribution of runoff and sediment of Huaxia hydrological station in Weihe River well, and that such joint probability distribution has very complex change characteristics at time scales. © 2014. Source


Wei W.B.,Haihe River Water Conservancy Commission | Yan S.K.,Basin Water
Proceedings of the 3rd Academic Conference of Geology Resource Management and Sustainable Development, GRMSD 2015 | Year: 2015

Influenced by global climate change and human activity, runoff generation of upper watershed of Chaobai River sustained less than that of ordinary years in recent years. To evaluate ecological flow satisfaction degree (EFSD) of rivers in the region, it was quantized by the standard of flow-ecological relations determined by Tennant method. Temporal distribution diagram of ecological flow satisfaction degree (TDDEFSD) was formed by confirming the 7-years EFSD of the two main tributaries, Chao River and Bai River, by month. Overall level of EFSD of the two tributaries was evaluated by the diagram, and the level variation through seasons and from upstream to downstream be also analyzed. For practice, the issues needed to be paid attention to during water resource development and utilization, were proposed from the water eco-environmental perspective. Source


Li S.Y.,Tianjin University | Tao J.H.,Tianjin University | Yu L.,Haihe River Water Conservancy Commission
Advanced Materials Research | Year: 2013

Zhangweinan basin is a typical area where has the most serious water resource shortage and water environmental deterioration problems in north of China. To improve the increasingly deteriorated water eco-environment, studies on the integrated management of water resources and water environment in the basin were carried out with focus on the prevention and control of water pollution, and based on which, an integrated management platform on water environment was developed. This paper introduces the platform architecture and elaborates the construction process of the total pollutant load control model and pollution incident early warning model. This platform provides technical supports for weakening the total pollutant load in the basin, reducing the pollutant load flowing into the Bohai Sea, and increasing the eco-flow of river channel and flow into the Bohai Sea. © (2013) Trans Tech Publications, Switzerland. Source

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