scholarly journals Evaluation of optimal irrigation scheduling and groundwater recharge at representative sites in the North China Plain with SWAP model and field experiments

2015 ◽  
Vol 116 ◽  
pp. 125-136 ◽  
Author(s):  
Ying Ma ◽  
Shaoyuan Feng ◽  
Xianfang Song
Keyword(s):  
Groundwater Recharge ◽  
North China Plain ◽  
North China ◽  
Field Experiments ◽  
Irrigation Scheduling ◽  
The North ◽  
The North China Plain ◽  
Swap Model

scholarly journals Groundwater recharge under irrigated agro-ecosystems in the North China Plain: From a critical zone perspective

2019 ◽  
Vol 29 (6) ◽  
pp. 877-890 ◽  
Author(s):  
Leilei Min ◽  
Yongqing Qi ◽  
Yanjun Shen ◽  
Ping Wang ◽  
Shiqin Wang ◽  
...  
Keyword(s):  
Groundwater Recharge ◽  
North China Plain ◽  
North China ◽  
Critical Zone ◽  
The North ◽  
The North China Plain

Impacts of thickening unsaturated zone on groundwater recharge in the North China Plain

2016 ◽  
Vol 537 ◽  
pp. 260-270 ◽  
Author(s):  
Guoliang Cao ◽  
Bridget R. Scanlon ◽  
Dongmei Han ◽  
Chunmiao Zheng
Keyword(s):  
Groundwater Recharge ◽  
Unsaturated Zone ◽  
North China Plain ◽  
North China ◽  
The North ◽  
The North China Plain

scholarly journals Sustainability Evaluation of the Maize–Soybean Intercropping System and Maize Monocropping System in the North China Plain Based on Field Experiments

Agronomy ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 268 ◽  
Author(s):  
Xiaolei Yang ◽  
Peng Sui ◽  
Yawen Shen ◽  
James Gerber ◽  
Dong Wang ◽  
...  
Keyword(s):  
North China Plain ◽  
North China ◽  
Field Experiments ◽  
Resource Scarcity ◽  
Social Consequences ◽  
Energy Output ◽  
The North ◽  
The North China Plain ◽  
Emergy Evaluation ◽  
Reduced Rate

Monocropping systems, which currently dominate China’s major grain production regions, contribute to resource scarcity and environmental pollution. Intercropping has the potential to improve resource use efficiency. However, prior studies of intercropping systems have generally focused on ecological, economic, and social consequences. Here, we make a comparative ecological sustainability analysis on energy capture and efficiency of maize monocropping and maize–soybean intercropping systems through emergy evaluation based on field experiments performed from 2012 to 2014. We find that maize monocropping shows higher sustainability than maize–soybean intercropping in the North China Plain at present. Quantitative results indicate that for maize monocropping, the emergy yield ratio (EYR) and emergy sustainability index (ESI) are 13.7% and 21.1% higher than that of intercropping systems, and the environmental loading ratio (ELR) is 7.3% lower than that of intercropping systems. To further test, we applied three levels of nitrogen fertilizer in intercropping systems (120 kg ha−1, 180 kg ha−1, 240 kg ha−1), and find that a reduced rate of N fertilizer for intercropped system leads to higher sustainability (ESI 5.3% higher) but still lower sustainability than maize monocropping. Key drivers of the different sustainability outcomes are decreased energy output and a larger proportion of labor input associated with intercropping systems.

scholarly journals How to Meter Agricultural Pumping at Numerous Small-Scale Wells?—An Indirect Monitoring Method Using Electric Energy as Proxy

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2477
Author(s):  
Lu Wang ◽  
Wolfgang Kinzelbach ◽  
Huaixian Yao ◽  
Jakob Steiner ◽  
Haijing Wang
Keyword(s):  
North China Plain ◽  
North China ◽  
Field Experiments ◽  
Electric Energy ◽  
Small Scale ◽  
Groundwater Abstraction ◽  
Monitoring Method ◽  
The North ◽  
The North China Plain ◽  
Trade Offs

The large number of users and the small scale of wells greatly complicate monitoring of groundwater abstraction in areas of intensive pumping by numerous smallholders such as in the North China Plain. This paper presents a study in a typical county in the North China Plain. It discusses the application and challenges of an indirect, energy-based approach to groundwater abstraction monitoring. Intensive field experiments at individual wells were carried out to provide a basis for the conversion from electric energy consumption to groundwater abstraction and to explore the feasibility of direct and indirect abstraction monitoring methods in the study area. The results show that the main challenge of electricity-to-water conversion lies in the large spread of conversion factors between wells. The conversion error at an individual well is found to be less than 20%. The same accuracy is achieved on spatially aggregated levels by testing only a small number of wells. Trade-offs can be made to obtain groundwater abstraction estimates at the required accuracy and with reasonable efforts regarding data collection. The analysis shows that energy-based groundwater abstraction monitoring outperforms direct water metering with respect to cost and robustness. It provides satisfactory data accuracy and equitability in regions where irrigation wells are powered by electricity.

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