The Effect Evaluation of Comprehensive Treatment for Groundwater Overdraft in Quzhou County, China

Abstract

Abstract:In recent years, land subsidence in the plain areas of Hebei Province has caused a tremendous potential safety hazard, and has seriously hindered the social and economic development of Hebei Province. Therefore, the relevant ministries and commissions of China decided to implement comprehensive treatments to restore and protect groundwater in Hebei Province from 2014. This paper evaluates the effect of the comprehensive treatments implemented at Quzhou County in 2014 and 2015. Based on socio-economic and surface and groundwater data, the study converted "electricity to water amount" to obtain the actual amount of agricultural groundwater exploitation, and then drew the effective precipitation and agricultural groundwater exploitation amount (P-W) curve. Finally, the study calculated the restriction amount of agricultural groundwater exploitation and validated the groundwater exploitation restriction effect by the variation of groundwater depth. The restriction amounts of agricultural groundwater exploitation of the projects (including water conservancy projects, agricultural projects, and forestry projects) implemented in 2014 and 2015 were 10.54 million m 3 and 5.65 million m 3 , respectively. The target completion ratios were 79.1% in 2014 and 100.8% in 2015, respectively. The groundwater depths of the project regions and the county have restored to some extent. Therefore, this study illustrated that the comprehensive treatments have played an effective role in groundwater recovery and the restriction of groundwater exploitation has not caused the reduction of grain production. The results of this study can also provide effective references and technical supports of the comprehensive treatments of groundwater overdraft for other similar regions.

Modeling Water and Nitrogen Balance of Different Cropping Systems in the North China Plain

“…Quzhou County (114.9 • E, 36.7 • N, 40 m above sea level) belongs to the prefecture-level city of Handan, located upstream of the Heilonggang River basin in southern Hebei province, which is one of the most affected area in terms of groundwater depletion in the world [34]. Fertilizers are highly used with inefficiency in the study area.…”

Managing nitrogen, water and carbon flows and their interactions for circularity in agrifood systems : - a case study in Quzhou, China

“…To validate our findings, we compared our calculated groundwater level changes with measured or officially reported data. The calculations indicate that Quzhou's groundwater level fell by 1.25 m between 2010 and 2015, which is within the 0.5-1.7 m range reported elsewhere for the same period (Xu et al, 2018;Wu and Wu, 2020). Moreover, the local government has maintained monitoring data on groundwater level since 2018 (DWRHP, 2019(DWRHP, -2021.…”

“…Groundwater accounted for 70% of the water supplied in the county before the local government restricted groundwater withdrawal in 2014 (DWRH, 2021). According to Xu et al (2018), this has caused groundwater overexploitation and induced groundwater overdraft. Additionally, reported that Quzhou's water supply was affected by severe salinization.…”

“…Additionally, reported that Quzhou's water supply was affected by severe salinization. To promote water security, several pilot projects have been launched since 2014, including introduction of highly efficient, water-saving irrigation techniques, seasonal land fallowing, and comprehensive control of groundwater overdraft (Xu et al, 2018;Deng et al, 2021).…”

ASSESSMENT OF GROUNDWATERS QUALITY WITH DEPTH (8-60 m) in the ARBËRIA NEIGHBOURHOOD OF GJILAN MUNICIPALITY, KOSOVO

“…Groundwater may contain natural impurities or pollutants regardless of human activity (1). Groundwater is an important water resource and a major factor for maintaining the regional ecological environment, which plays a significant role in ensuring water, food, economic, and ecological security (2). The chemical composition of groundwater is the product of the long-term interaction between groundwater and the surrounding environment.…”