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The influences of sponge city construction on spring discharge in Jinan city of China
Hydrology Research ( IF 2.7 ) Pub Date : 2020-05-20 , DOI: 10.2166/nh.2020.008 Kangning Sun 1 , Litang Hu 1 , Xiaomeng Liu 2
Hydrology Research ( IF 2.7 ) Pub Date : 2020-05-20 , DOI: 10.2166/nh.2020.008 Kangning Sun 1 , Litang Hu 1 , Xiaomeng Liu 2
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In recent years, intense human activities have threatened to dry up the well-known karst springs in Jinan, China. Sponge city construction program was one of the measures aiming to improve the recharge to groundwater and also protect sources of spring discharge. An influence study of sponge city construction on groundwater is necessary while not fully evaluated. In this paper, a threedimensional numerical groundwater flow model was developed to address this issue. Model calibration showed that the simulated groundwater level successfully reproduced the observed results. Then, 12 scenarios were established and predicted according to different precipitation conditions and the achieved degrees of sponge city construction. The results indicated that the sponge city construction was conducive to the rise of regional groundwater level after 20 years. However, the groundwater level around the spring groups would only increase by an average of 0.22 m, and the annual spring discharge would increase by approximately 9.00 million m after 20 years. Results revealed that the extent of spring discharge recovery was not evident in a short time frame. The proper positioning of sponge city construction was suggested to be considered further to balance the protection of springs with the issue of waterlogging. This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (CC BY 4.0), which permits copying, adaptation and redistribution, provided the original work is properly cited (http://creativecommons.org/licenses/by/4.0/). doi: 10.2166/nh.2020.008 ://iwaponline.com/hr/article-pdf/doi/10.2166/nh.2020.008/697159/nh2020008.pdf Kangning Sun Litang Hu (corresponding author) College of Water Sciences, Beijing Normal University, Beijing 100875, China; Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, Beijing 100875, China and Engineering Research Center of Groundwater Pollution Control and Remediation of Ministry of Education, Beijing 100875, China E-mail: litanghu@bnu.edu.cn Xiaomeng Liu The Government of Beishicao Town Shunyi District, Beijing 101300, China
更新日期：2020-05-20
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