scholarly journals Study on Groundwater Recharge Based on Chloride Mass Balance and Hydrochemistry in the Irrigated Agricultural Area, North China Plain

2021 ◽  
Author(s):  
Xi Zhang ◽  
Jiansheng Chen ◽  
Lucheng Zhan ◽  
Fenyan Ma ◽  
Jiaheng Yan ◽  
...  
Keyword(s):  
Groundwater Quality ◽  
Mass Balance ◽  
Groundwater Recharge ◽  
Soil Water ◽  
Irrigation Water ◽  
North China Plain ◽  
North China ◽  
Groundwater Resources ◽  
Shallow Groundwater ◽  
Chloride Mass Balance

Abstract In the North China Plain, water shortage seriously restricts economic development, and agricultural irrigation depends heavily on groundwater extraction. Irrigation water and precipitation may directly recharge to groundwater in the irrigated agricultural region. Therefore, calculating the recharge of precipitation and irrigation to groundwater is essential for the sustainable utilization of water resources. Furthermore, determining the transformation relationship of precipitation-soil water-groundwater is helpful to understand the hydrological cycle process better. The average groundwater recharge calculated by the chloride mass balance method is between 66 and 144mm/yr, accounting for only 7%–17% of the total precipitation and irrigation water. The hydrogen and oxygen isotopes reveal that precipitation only affect soil water in topsoil, and soil water in deep soil is recharged upward by groundwater. Hydrochemical composition of soil water shows high concentrations of solutes in unsaturated zones. Infiltration water dissolves solutes through the unsaturated zone and brings them into the shallow groundwater, causing the deterioration of shallow groundwater quality. Therefore, reducing the recharge of precipitation and irrigation to groundwater by controlling the groundwater level and the intensity of single irrigation is recommended to protect groundwater quality. These results contribute to the effective management of groundwater resources and the control of agricultural pollution in groundwater.

scholarly journals Where to locate a tree plantation within a low rainfall catchment to minimise impacts on groundwater resources

2014 ◽  
Vol 11 (8) ◽  
pp. 10001-10041 ◽  
Author(s):  
J. F. Dean ◽  
J. A. Webb ◽  
G. E. Jacobsen ◽  
R. Chisari ◽  
P. E. Dresel
Keyword(s):  
Water Resources ◽  
Mass Balance ◽  
Groundwater Recharge ◽  
Water Table ◽  
Groundwater Resources ◽  
Chloride Mass Balance ◽  
Tree Plantation ◽  
Depth Analysis ◽  
Paired Catchment ◽  
The Impact

Abstract. Despite the fact that there are many studies that consider the impacts of plantation forestry on water resources, and others that explore the spatial heterogeneity of groundwater recharge in dry regions, there is little marriage of the two subjects in forestry management guidelines and legislation. Here we carry out an in-depth analysis of the groundwater and surface water regime in a low rainfall, high evapotranspiration paired catchment study to examine the impact of reforestation, using water table fluctuations and chloride mass balance methods to estimate groundwater recharge. Recharge estimations using the chloride mass balance method were shown to be more likely representative of groundwater recharge regimes prior to the planting of the trees, and most likely prior to widespread land clearance by European settlers. These estimations were complicated by large amounts of recharge occurring as a result of runoff and streamflow in the lower parts of the catchment. Water table fluctuation method estimations of recharge verified that groundwater recharge occurs predominantly in the lowland areas of the study catchment. This leads to the conclusion that spatial variations in recharge are important considerations for locating tree plantations with respect to conserving water resources for downstream users. For dry regions, this means planting trees in the upland parts of the catchments, as recharge is shown to occur predominantly in the lowland areas.

A soil-water-balance approach to quantify groundwater recharge from irrigated cropland in the North China Plain

2003 ◽  
Vol 17 (10) ◽  
pp. 2011-2031 ◽  
Author(s):  
Eloise Kendy ◽  
Pierre Gérard-Marchant ◽  
M. Todd Walter ◽  
Yongqiang Zhang ◽  
Changming Liu ◽  
...  
Keyword(s):  
Water Balance ◽  
Groundwater Recharge ◽  
Soil Water ◽  
North China Plain ◽  
North China ◽  
Soil Water Balance ◽  
The North ◽  
The North China Plain ◽  
Balance Approach

Simulation and prediction of shallow groundwater depth in the North China Plain based on regional periodic characteristics

2021 ◽  
Vol 80 (18) ◽  
Author(s):  
Long Sun ◽  
Yongbing Zhang ◽  
Haiyang Si ◽  
Tema Koketso Ealotswe ◽  
Lei Wei ◽  
...  
Keyword(s):  
North China Plain ◽  
North China ◽  
Shallow Groundwater ◽  
Groundwater Depth ◽  
The North ◽  
The North China Plain

scholarly journals Does Crop Rotation Enhance Groundwater Health? A Review of the Winter Wheat Fallow Policy in the North China Plain

Water ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2416
Author(s):  
Ming Lei ◽  
Yuqian Zhang ◽  
Yuxuan Dang ◽  
Xiangbin Kong ◽  
Jingtao Yao
Keyword(s):  
Winter Wheat ◽  
Water Consumption ◽  
North China Plain ◽  
North China ◽  
Shallow Groundwater ◽  
Agricultural Water ◽  
The North ◽  
The North China Plain ◽  
The World ◽  
Shallow Groundwater Level

Agricultural water management is a vital component of realizing the United Nation’s Sustainable Development Goals because of water shortages worldwide leading to a severe threat to ecological environments and global food security. As an agro-intensified irrigation area, the North China Plain (NCP) is the most important grain basket in China, which produces 30%–40% of the maize and 60%–80% of the wheat for China. However, this area has already been one of the largest groundwater funnels in the world due to long-term over-exploitation of groundwater. Due to the low precipitation during the growing period, winter wheat requires a large amount of groundwater to be pumped for irrigation, which consumes 70% of the groundwater irrigation. To alleviate the overexploitation of groundwater, the Chinese government implemented the Winter Wheat Fallow Policy (WWFP) in 2014. The evaluation and summarization of the WWFP will be beneficial for improving the groundwater overexploitation areas under high-intensity irrigation over all the world. So far, there have been few attempts at estimating the effectiveness of this policy. To fill this gap, we assessed the planting area of field crops and calculated the evapotranspiration of crops based on remote-sensed and meteorological data in the key area—Hengshui. We compared the agricultural water consumption before and after the implementation of this policy, and we analyzed the relationship between changes in crop planting structure and groundwater variations based on geographically weighted regression. Our results showed the overall classification accuracies for 2013 and 2015 were 85.56% and 82.22%, respectively. The planting area of winter wheat, as the most reduced crop, decreased from 35.71% (314,053 ha) in 2013 to 32.98% (289,986 ha) in 2015. The actual reduction in area of winter wheat reached 84% of the target (26 thousand ha) of the WWFP. The water consumption of major crops decreased from 2.98 billion m3 of water in 2013 to 2.83 billion m3 in 2015, a total reduction of 146 million m3, and 88.43% of reduced target of the WWFP (166 million m3). The planting changes of winter wheat did not directly affect the change of shallow groundwater level, but ET was positively related to shallow groundwater level and precipitation was negatively related to shallow groundwater levels. This study can provide a basis for the WWFP’s improvement and the development of sustainable agriculture in high-intensity irrigation areas.

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