Your search found 5 records
1 Zhang, B.; Li, F. M.; Huang, G.; Cheng, Z. Y.; Zhang, Y. 2006. Yield performance of spring wheat improved by regulated deficit irrigation in an arid area. Agricultural Water Management, 79(1):28-42.
Water deficit ; Wheat ; Irrigated farming ; Water use efficiency ; Soil moisture ; Crop yield / China / Gansu Province / Zhangye
(Location: IWMI-HQ Call no: PER Record No: H038284)
2 Xue, J.; Huo, Z.; Huang, Q.; Wang, F.; Boll, J.; Huang, G.; Qu, Z. 2019. Assessing sustainability of agricultural water saving in an arid area with shallow groundwater. Irrigation and Drainage, 68(2):205-217. [doi: https://doi.org/10.1002/ird.2295]
Water conservation ; Agricultural practices ; Sustainability ; Irrigation water ; Evaluation ; Water use efficiency ; Water balance ; Models ; Water productivity ; Soil salinity ; Environmental effects ; Economic aspects ; Social aspects ; Drainage systems ; Arid zones ; Case studies / China / Jiefangzha Irrigation District
(Location: IWMI HQ Call no: e-copy only Record No: H049343)
(2.39 MB)
Agricultural water-saving practices are important in order to cope with the increasing shortage of water resources in arid and semi-arid areas. With water use efficiency and productivity being improved, however, more intense regional agricultural water-saving practices may induce the reduction of vegetation coverage and also groundwater decline. We assess the sustainability of regional agricultural water-saving practices in an arid area based on the analytic hierarchy process (APH). By calculating water use efficiency, economic benefit, social benefit and eco-environmental effect, the sustainability of regional agricultural water savings can be comprehensively evaluated and classified using different sustainability evaluation scoring standards. As a case study, the method was used in the Jiefangzha irrigation district (JFID), and the sustainability of agricultural water saving was assessed from 1990 to 2009. The results indicate that economic benefit and social water-saving awareness have increased dramatically since 1998. Water use efficiency and productivity have increased continuously, while the declining groundwater has had negative effects on vegetation coverage. Since 1998, the sustainability state shows an increasing trend with its all values above the alert line (0.4), and most of the sustainability values above the good line (0.6), which reveals a good condition of the sustainability of agricultural water savings in the JFID
3 Xue, J.; Huo, Z.; Wang, S.; Wang, C.; White, I.; Kisekka, I.; Sheng, Z.; Huang, G.; Xu, X. 2020. A novel regional irrigation water productivity model coupling irrigation- and drainage-driven soil hydrology and salinity dynamics and shallow groundwater movement in arid regions in China. Hydrology and Earth System Sciences, 24(5):2399-2418. [doi: https://doi.org/10.5194/hess-24-2399-2020]
Irrigation water ; Water productivity ; Models ; Irrigation canals ; Drainage systems ; Groundwater table ; Hydrology ; Salinity ; Cropping patterns ; Soil moisture ; Crop water use ; Crop production ; Sunflowers ; Wheat / China / Jiefangzha Irrigation District
(Location: IWMI HQ Call no: e-copy only Record No: H049768)
https://www.hydrol-earth-syst-sci.net/24/2399/2020/hess-24-2399-2020.pdf
https://vlibrary.iwmi.org/pdf/H049768.pdf
https://vlibrary.iwmi.org/pdf/H049768.pdf
(3.87 MB) (3.87 MB)
The temporal and spatial distributions of regional irrigation water productivity (RIWP) are crucial for making decisions related to agriculture, especially in arid irrigated areas with complex cropping patterns. Thus, in this study, we developed a new RIWP model for an irrigated agricultural area with complex cropping patterns. The model couples the irrigation- and drainage-driven soil water and salinity dynamics and shallow groundwater movement in order to quantify the temporal and spatial distributions of the target hydrological and biophysical variables. We divided the study area into 1 km × 1 km hydrological response units (HRUs). In each HRU, we considered four land use types: sunflower fields, wheat fields, maize fields, and uncultivated lands (bare soil). We coupled the regional soil hydrological processes and groundwater flow by taking a weighted average of the water exchange between unsaturated soil and groundwater under different land use types. The RIWP model was calibrated and validated using 8 years of hydrological variables obtained from regional observation sites in a typical arid irrigation area in North China, the Hetao Irrigation District. The model simulated soil moisture and salinity reasonably well as well as groundwater table depths and salinity. However, overestimations of groundwater discharge were detected in both the calibration and validation due to the assumption of well-operated drainage ditch conditions; regional evapotranspiration (ET) was reasonably estimated, whereas ET in the uncultivated area was slightly underestimated in the RIWP model. A sensitivity analysis indicated that the soil evaporation coefficient and the specific yield were the key parameters for the RIWP simulation. The results showed that the RIWP decreased from maize to sunflower to wheat from 2006 to 2013. It was also found that the maximum RIWP was reached when the groundwater table depth was between 2 and 4 m, regardless of the irrigation water depth applied. This implies the importance of groundwater table control on the RIWP. Overall, our distributed RIWP model can effectively simulate the temporal and spatial distribution of the RIWP and provide critical water allocation suggestions for decision-makers.
4 Xiong, L.; Xu, X.; Engel, B.; Xiong, Y.; Huang, Q.; Huang, G.. 2021. Predicting agroecosystem responses to identify appropriate water-saving management in arid irrigated regions with shallow groundwater: realization on a regional scale. Agricultural Water Management, 247:106713. (Online first) [doi: https://doi.org/10.1016/j.agwat.2020.106713]
Water conservation ; Water management ; Agroecosystems ; Forecasting ; Arid zones ; Groundwater ; Watersheds ; Irrigation water ; Irrigated sites ; Farmland ; Crop yield ; Vegetation ; Soil salinity ; Soil water ; Hydrology / China / Yellow River Basin / Jiyuan Irrigation System
(Location: IWMI HQ Call no: e-copy only Record No: H050201)
(10.00 MB)
Scenario analysis is the basis of developing rational water management practices (WMPs) for watersheds. How to predict future hydrological responses on a regional-scale is still a challenge for modeling work in irrigated watersheds with shallow groundwater environments. Therefore, this paper presents an efficient realization of predicting regional agroecosystem responses and searching for appropriate WMPs, through using a water balance-based, semi-distributed hydrological model (SWAT-AG). The scenario case study is carried out in the Jiyuan Irrigation System located in the Hetao of upper Yellow River basin, based on the calibrated and validated modeling work in our previous companion paper. Eight scenarios of water-saving practices (WSPs) are proposed, with consideration for reducing irrigation depth and controlling initial groundwater depth. Then the coupled responses of agroecosystem processes to various WSPs are predicted for the case study region in 2012 and 2013, mainly related to the groundwater depth, root zone soil water and salinity, and crop yield/natural vegetation biomass. Based on the analysis for proposed scenarios, the 100% of present irrigation depth combined with increasing initial GWD by 50 cm are recommended as appropriate WSPs for dry years, and the 80% of present irrigation depth combined with increasing initial GWD by 100 cm are recommended for wet years, in order to maintain good environmental conditions for both crops and natural vegetation. In addition, results show that SWAT-AG could overcome the scale/function limitations of traditional soil/crop models and also avoid computational issues of numerical models. We further point out that the scenarios in reality will be more complicated and comprehensive in time and space, and thus the predictions should be updated accordingly. Overall, this case study fully presents the feasibility and practicality of using the SWAT-AG model to realize the scenario response analysis and water management decision-making on a region scale for irrigated watersheds with shallow groundwater environments.
5 Wang, T.; Zhang, J.; You, L.; Zeng, X.; Ma, Y.; Li, Y.; Huang, G.. 2023. Optimal design of two-dimensional water trading considering hybrid “three waters”-government participation for an agricultural watershed. Agricultural Water Management, 288:108457. (Online first) [doi: https://doi.org/10.1016/j.agwat.2023.108457]
Water markets ; Government ; Participation ; Water conservation ; Uncertainty ; Analysis ; Watersheds ; Models ; Water resources ; Water quality ; Ecology ; Water rights ; Water use ; Decision making ; Stream flow ; Sewage ; Surface water ; Water balance / China / Dagu River Basin / Qingdao / Shandong
(Location: IWMI HQ Call no: e-copy only Record No: H052121)
https://www.sciencedirect.com/science/article/pii/S0378377423003220/pdfft?md5=d9572c1601607111fa59e3dd324559bc&pid=1-s2.0-S0378377423003220-main.pdf
https://vlibrary.iwmi.org/pdf/H052121.pdf
https://vlibrary.iwmi.org/pdf/H052121.pdf
(4.97 MB) (4.97 MB)
Sharp increase in water consumption and pollutant emissions makes shortage of clean water the main problem hindering regional agricultural development. Two-dimensional water trading (2DWT) can unify the quantity and quality of water to relieve the water crisis in agricultural watersheds. This study developed a hybrid “three waters”-government participation based two-dimensional water trading model group (TWG-2DWTMs) to support 2DWT planning under various complexities. The linkage among water resources, water quality and ecology (i.e., “three waters”) as well as government participation are considered. The TWG-2DWTMs has been applied in Dagu River basin in Qingdao city, an agricultural watershed, and solved under multiple trading rules and water-saving scenarios. The results indicate that trading rule for government participation with ecological runoff guarantee of river regions and concentration control of monitoring sections (CERG) is the optimal trading rule and should be recommended. CERG can realize the transformation from water rights to discharge permits, and promote economic development while ensuring water ecology and water environment. Furthermore, under CERG, water-saving percentage of 50% is the optimal water-saving scenario; water saving can bring about surplus water rights that can be directly traded or transformed into discharge permits, promoting local sustainable development.
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