Groundwater Hydrology

Oral Abstract

Water Quantity and Quality Risk Assessment of the Karst Aquifer Recharge with Multi-source Water in Yufu River, Jinan

Wednesday, January 4
10:30 AM - 12:30 PM
Location: Chu Feng Hall

Jinan is well known as Spring City in the China, and the spring water originates the precipitation infiltration of north slope of Mountain Tai. With the industrialization and rapid urbanization as well as the effect of the urban district expanding towards the southern mountain area where is located in direct groundwater recharge area, the flowing of spring groups in the urban district are disturbed seriously. Although Yellow River diversion projects have been built, replacing groundwater supply for domestic use, Jinan is facing a new problem of drinking water quality decline compared by groundwater. Therefore, transformation of multiple surface water resources into karst water by building recharging engineering in the Yufu River of the west of spring area is an important measure to solve the contradiction between spring protection and water supply security. The study area of the strong seepage reach in the Yufu River upstream was selected, where a several of managed aquifer recharge projects have been built. On the one hand, local surface runoff is stored and regulated by Wohushan reservoir upstream of Yufu River which has larger flood discharge during flood period so that surface water can be released during non flood season to leakage reach to recharge aquifer; on the other hand, some pumping stations projects downstream pump the Yellow River or Yangtze River water to the upstream, the design rate of 400,000 m3/d. How to determine the reasonable discharge quantity of water and period of time is the most important problem to be solved. According to the hydrogeological conditions of strong leakage reach, through the methods of field surveys, monitoring, test and numerical simulation etc., the maximum infiltration volume was calculated in the study area. The three scenarios of recharge scheme, the maximum, medium, minimum groundwater level depth, were analyzed to maximize surface water is recharged into the karst aquifer effectively. In addition the water quality as source water of the Yellow River is worse than karst water and it will lead to the groundwater quality risk if the Yellow River water infiltrate karst aquifer. In order to make sense of it, the source water (local surface water and the Yellow River water ) and karst water in the historical monitoring data were collected. And land use pattern upstream reach was identified by field investigation. and the physical and chemical indicators of a variety of water were monitored by sampling for each event of surface water releasing. At the same time, the risk of the project of multi-source water recharge of the Yufu River was assessed based on the MAR guidelines of Australia. The results showed that karst aquifer upstream recharge with the multiple source water can be optimized to improve the recharge efficiency and reduce the loss of water according to the reasonable allocation of discharge quantity and period of time. There still exist some potential risks in terms of analysis result of the conventional indicators of water quality when Yellow River water being released in the long period of time and large quantity.

Weiping Wang

University of Jinan

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Jinchao Li

University of Jinan

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Shisong Qu

University of Jinan

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Qian Rong

University of Jinan

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Water Quantity and Quality Risk Assessment of the Karst Aquifer Recharge with Multi-source Water in Yufu River, Jinan



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