Evaluations of Shallow Groundwater Recharges and Water Use Practices at Robit Watershed

2022 ◽  
pp. 27-48
Author(s):  
Dagnew Y. Takele ◽  
Seifu A. Tilahun ◽  
Fasikaw A. Zimale ◽  
Petra Schmitter ◽  
Bayu G. Bihonegn ◽  
...  
Keyword(s):  
Water Use ◽  
Shallow Groundwater ◽  
Water Use Practices

scholarly journals Yield, Nitrogen Uptake and Nitrogen Leaching of Sensor-Based Fertigation-Cultured Tomato in a Shallow Groundwater Region: Effect of Shallow Groundwater on Tomato Irrigation

2019 ◽  
Vol 12 (1) ◽  
pp. 10
Author(s):  
Jinji Zhang ◽  
Zhuangzhuang Cao ◽  
Haibo Dai ◽  
Zhiping Zhang ◽  
Minmin Miao
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Groundwater Level ◽  
Eastern China ◽  
Shallow Groundwater ◽  
Water Volume ◽  
N Leaching ◽  
Growing Seasons ◽  
Tomato Yield ◽  
Use Efficiency

Fertigation with surface drip has been introduced and broadly applied for vegetable cultivation in the Eastern China, which presents high precipitation and always has shallow groundwater. To estimate the influence of high groundwater level on the tomato nitrogen (N) and water use efficiency and develop new sensor-based fertigation technology, experiments were executed in plastic greenhouse in the experimental farm of Yangzhou University located in the suburban of Yangzhou city during 2016-2017 growing seasons using a block randomization with three replications. Three N dosages and 4 watering treatments were carried out in this experiment. The data indicated that irrigation threshold of -35 kPa was optimum to get the maximum production of tomato. In this treatment, the value of estimated plant evapotranspiration (ETc) was much higher than total applied water volume, suggesting high groundwater table had a significant contribution on the tomato ETc and a sensor-based irrigation strategy should be more accurate than the simulated ETc irrigation method to calculate the water demand under this condition. In addition, our results indicated that high groundwater level had a positive effect to alleviating N leaching. Finally, we can conclude that fertigation technology enhanced the N use efficiency (NUE) and water use efficiency (WUE) and three fourths of the calculated N dosage (according to a traditional nutrient equation) was sufficient to optimize tomato yield.

Managing Crop Diseases Under Water Scarcity

2020 ◽  
Vol 58 (1) ◽  
pp. 387-406
Author(s):  
Cassandra L. Swett
Keyword(s):  
Water Use ◽  
Water Scarcity ◽  
Crop Production ◽  
Disease Risk ◽  
Underlying Disease ◽  
Future Research ◽  
Management Options ◽  
Beneficial Effects ◽  
Crop Diseases ◽  
Water Use Practices

The significance of water scarcity to crop production and food security has been globally recognized as a pivotal sustainability challenge in the UN Sustainable Development Goals ( 86 ). The critical link between water scarcity and sustainability is adaptation. Various changes in water use practices have been employed to alleviate production constraints. However, the potential for these changes to influence crop diseases has received relatively little attention, despite the circumglobal importance of diseases to agricultural sustainability. This article reviews what is known about the realized effects of scarcity-driven alterations in water use practices on diseases in the field in order to raise awareness of the potential for both increased disease risk and possible beneficial effects on crop disease management. This is followed by consideration of the primary mechanistic drivers underlying disease outcomes under various water use adaptation scenarios, concluding with a vision for disease–water co-management options and future research needs.

scholarly journals Exploring scale-effects on water balance components and water use efficiency of toposequence rice fields in Northern Italy

2018 ◽  
Vol 49 (6) ◽  
pp. 1711-1723 ◽  
Author(s):  
A. Facchi ◽  
M. Rienzner ◽  
S. Cesari de Maria ◽  
A. Mayer ◽  
E. A. Chiaradia ◽  
...  
Keyword(s):  
Water Balance ◽  
Water Use ◽  
Water Reuse ◽  
Scale Effects ◽  
Shallow Groundwater ◽  
Northern Italy ◽  
Rice Fields ◽  
Water Balance Components ◽  
Spatial Domains ◽  
Single Rice

Abstract Water use efficiencies (WUEs) between 20% and 60% are commonly reported for single rice paddies. When larger spatial domains are considered, higher WUE than minimum values observed for individual fields are expected due to water reuse. This study investigates scale-effects on water balances and WUEs of four adjacent rice fields located in Northern Italy and characterized by different elevations (A ≅ B + C > D). Water balance terms for the paddies were quantified during the agricultural season 2015 through the integrated use of observational data and modelling procedures. Following a Darcy-based approach, percolation was distinguished from net seepage. Results showed net irrigation of about 2,700 and 2,050 mm for fields A and B, and around 640 and nearly 0 mm for C and D. WUE of A, B, C and D amounted, respectively, to 21, 28, 66 and >100%. Values for C and D were due to less permeable soils, to seepage fluxes providing extra water inputs and to the shallow groundwater level. When the group of paddies ACD was considered (B was not included since it was separated by a deep channel), net irrigation and WUE were found to reach 1,550 mm and 39%, confirming the important role of water reuses in paddy agro-ecosystems.

scholarly journals Scoping of promising land management and water use practices in the dry areas of Uzbekistan

2018 ◽  
Vol 207 ◽  
pp. 15-25 ◽  
Author(s):  
Mirzokhid Mirshadiev ◽  
Luuk Fleskens ◽  
Jos van Dam ◽  
Alim Pulatov
Keyword(s):  
Water Use ◽  
Land Management ◽  
Dry Areas ◽  
Water Use Practices

scholarly journals Water Taxation and Subsidy Analysis Based on Consumer Water Use Behavior and Water Sources Inside the Kathmandu Valley

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1802 ◽  
Author(s):  
Rajit Ojha ◽  
Bhesh Thapa ◽  
Sadhana Shrestha ◽  
Junko Shindo ◽  
Hiroshi Ishidaira ◽  
...  
Keyword(s):  
Water Use ◽  
Rainwater Harvesting ◽  
Groundwater Resources ◽  
Shallow Groundwater ◽  
Water Source ◽  
Water Sources ◽  
Water Price ◽  
Kathmandu Valley ◽  
Total Expenditure ◽  
Groundwater Exploitation

Groundwater is a major alternative water source used to cover the deficit of water supplied by Kathmandu Upatyaka Khanepani Limited (KUKL), the authority responsible for water supply inside Kathmandu Valley. The groundwater price relative to that of KUKL affects priority of usage, and hence, groundwater resources sustainability. Therefore, taxation or subsidies on water sources become necessary based on their implication on environment. In this study, we evaluate volumetric water price, including initial investment, operation and maintenance (O&M) cost for different water sources, and compare it with the water price of KUKL, Kathmandu. The results show that shallow groundwater is cheaper than KUKL’s water. For groundwater sustainability, taxation on shallow groundwater seems necessary. For the recent water use of 97 LPCD (liters per capita per day) the taxation requirement is Nepalese Rupee (NRs.) 320/month (0.35% of total expenditure) if the initial investment for well construction and O&M cost are considered, and NRs. 626 (0.7% of total expenditure) if only O&M cost is considered. On the other hand, rainwater harvesting and recharging, the measures to cope with groundwater exploitation, might need 40% to 50% subsidy for their initial investment.

scholarly journals Groundwater Table Effects on the Yield, Growth, and Water Use of Canola (Brassica napus L.) Plant

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1730 ◽  
Author(s):  
Hakan Kadioglu ◽  
Harlene Hatterman-Valenti ◽  
Xinhua Jia ◽  
Xuefeng Chu ◽  
Hakan Aslan ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Water Use ◽  
Water Table ◽  
Shallow Groundwater ◽  
Growth And Yield ◽  
High Yield ◽  
Brassica Napus L ◽  
Yield Parameters ◽  
Plant Water Use ◽  
Optimum Depth

Lysimeter experiments were conducted under greenhouse conditions to investigate canola (Brassica napus L.) plant water use, growth, and yield parameters for three different water table depths of 30, 60, and 90 cm. Additionally, control experiments were conducted, and only irrigation was applied to these lysimeters without water table limitations. The canola plant’s tolerance level to shallow groundwater was determined. Results showed that groundwater contributions to canola plant for the treatments at 30, 60, and 90 cm water table depths were 97%, 71%, and 68%, respectively, while the average grain yields of canola were 4.5, 5.3, and 6.3 gr, respectively. These results demonstrate that a 90 cm water table depth is the optimum depth for canola plants to produce a high yield with the least amount of water utilization.

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