Abstract
The Chinese government hopes to implement groundwater table control to realize the sustainable utilization of groundwater resources based on controlling the current groundwater exploitation amount. In this study, a method to determine the control index of the groundwater table is proposed. In the method, the reasonable relationship between the groundwater table and groundwater exploitation amount is ensured using the groundwater numerical simulation model. The operability of the index determination is improved using a surrogate numerical model, and the annual hydrological dynamic is simplified to three scenarios of dry, flat, and wet. To verify this method, the Minqin Basin in Northwest China was chosen as a typical study area. It is assumed that the control index of groundwater exploitation in 2020 is 85,000 × 103m3. Then, the preset annual water table index is calculated as [−0.70, 0.62, 1.13, −1.25, 1.36, 3.09] m [−0.77, 0.53, 1.05, −1.33, 1.27, 2.96] m, and [−0.83, 0.46, 0.99, −1.40, 1.20, 2.85] m for the chosen six monitoring wells, varying over the years with wet, flat, and dry scenarios. This method can ensure high precision, operability, and dynamic management when determining the control index of the groundwater table and satisfy the demand of managers.
Highlights
Groundwater is an important strategic resource in China
Taking into account the increase in the number of numerical model runs caused by an increase in the sampling dimension, this study suggests that n ≤ 100; qi is divided into equal sampling intervals of n, and independent random sampling is conducted from each interval, The values extracted from q1 and the values extracted from q2 are matched randomly, and, the q(i,j) of the m × n dimension is obtained by continuing this process. h(k) = (h1,h2, . . . ho) is a response value of the o dimension
According to the groundwater numerical simulation model, data on the groundwater exploitation amount and water table were obtained under different hydrological scenarios
Summary
Groundwater is an important strategic resource in China. China has too many people and insufficient water resources, as well as uneven spatial and temporal distribution of the country’s water resources. Unreasonable development and utilization in China have caused a series of serious problems, such as water table decline, water pollution, and water ecological deterioration in recent years. Like other countries with water shortage problems [1,2], the Chinese government has strengthened the management of groundwater to ensure the sustainable utilization of water resources. The government hopes to achieve the restoration of groundwater over mining areas, utilization management, and groundwater conservation by implementing legislation, rules, and regulations. The implementation of groundwater exploitation amount control and groundwater table control is regarded as the basic principle for strict groundwater management and protection under current regulations
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
