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Water 2019, 11(4), 744; https://doi.org/10.3390/w11040744

Study on the Assessment Method of the Impact on Hydrological Safety of Riverside Pit-Ponds along a Dike

1
State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, China
2
Nanjing Hydraulic Research Institute, Nanjing 210029, China
3
Dam Safety Management Center of the Ministry of Water Resources, Nanjing 210029, China
4
Jiangsu Kexing Project Management Co., Ltd., Nanjing 210029, China
*
Author to whom correspondence should be addressed.
Received: 7 March 2019 / Revised: 27 March 2019 / Accepted: 6 April 2019 / Published: 10 April 2019
(This article belongs to the Section Water Resources Management and Governance)
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Abstract

Riverside pit-ponds are one of the hidden dangers of flood control project safety. At present, the safety evaluation of riverside pit-ponds is limited to the seepage and stable safety review of the dam, and the impact of the pit on the river flow is not considered. In this paper, a two-dimensional mathematical model of flow is established. Pressure correction method is used to solve the pressure-velocity coupling. Topographic cutting method is used to deal with the dynamic boundary problem. The model grid of the pit-ponds area is encrypted. The accuracy of the model in the analysis of river hydrodynamics is verified by an example. The model is applied to the evaluation of the impact of the pit-ponds on river flooding. Taking some riverside pit-ponds of the Yellow River as an example, the river water level, velocity, and flow in the present condition and the backfill condition are simulated by the model. The results show that the existence of these riverside pit-ponds only affects the hydrological features of regions around the pit-ponds, and the impact is too insignificant to threaten the hydrological safety. Through the hydrological safety assessment of the project, it is shown that the combination of the two-dimensional flow mathematical model with seepage, anti-sliding, and seismic safety review can comprehensively assess the hydrological safety of dike engineering. View Full-Text
Keywords: safety engineering; hydrological safety; riverside pit-ponds; dike engineering; two-dimensional mathematical model of flow safety engineering; hydrological safety; riverside pit-ponds; dike engineering; two-dimensional mathematical model of flow
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Liu, S.; Yang, D.; Sheng, J.; Chen, J.; Xu, C.; Chen, Y. Study on the Assessment Method of the Impact on Hydrological Safety of Riverside Pit-Ponds along a Dike. Water 2019, 11, 744.

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