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Assessment of Capillary Rise from Shallow Groundwater by the Simulation Model SIMWASER Using Either Estimated Pedotransfer Functions or Measured Hydraulic Parameters

Stenitzer, E.; Diestel, H.; Zenker, Th.; … - In: Water Resources Management 21 (2007) 9, pp. 1567-1584

The performance of the water balance and crop growth model SIMWASER to estimate the water supply of a lawn by capillary rise from shallow ground water was investigated by using lysimeter measurements with a sandy and a clayey soil. Moreover the robustness of the model was evaluated by running it...

Persistent link: https://www.econbiz.de/10010997374

Capillary rise in porous media

Lago, Marcelo; Araujo, Mariela - In: Physica A: Statistical Mechanics and its Applications 289 (2001) 1, pp. 1-17

Capillary rise experiments were performed in columns filled with glass beads and Berea sandstones, using visual methods to register the advance of the water front. For the glass-bead-filled columns, early time data is well fitted by the Washburn equation. However in the experiments, the...

Persistent link: https://www.econbiz.de/10010872078

Assessing the effects of water table depth on water use, soil salinity and wheat yield: Searching for a target depth for irrigated areas in the upper Yellow River basin

Xu, Xu; Huang, Guanhua; Sun, Chen; Pereira, Luis S.; … - In: Agricultural Water Management 125 (2013) C, pp. 46-60

The irrigation districts of the upper Yellow River basin face a progressive reduction of water allocation and the need to apply water-saving practices due to increasing water scarcity. The adoption of such practices will lead to lower water tables, hopefully in conjunction with controlled soil...

Persistent link: https://www.econbiz.de/10010678953

Optimizing Deficit Irrigation Scheduling Under Shallow Groundwater Conditions in Lower Reaches of Amu Darya River Basin

Akhtar, Fazlullah; Tischbein, Bernhard; Awan, Usman - In: Water Resources Management 27 (2013) 8, pp. 3165-3178

Water demand for irrigated agriculture is increasing against limited availability of fresh water resources in the lower reaches of the Amu Darya River e.g., Khorezm region of Uzbekistan. Future scenarios predict that Khorezm region will receive fewer water supplies due to climate change,...

Persistent link: https://www.econbiz.de/10010997671

Soil water potential and recoverable water stress in drought tolerant and susceptible rice varieties

Dasgupta, Pragna; Das, Bhabani S.; Sen, Soumitra K. - In: Agricultural Water Management 152 (2015) C, pp. 110-118

We conducted a two-year field experiment to determine if water stress could be exploited to recover yield in one drought resistant (Vandana) and three susceptible (IR36, IR72 and Swarna) rice varieties. Stress was induced in active tillering, flowering and grain filling stages by suspending...

Persistent link: https://www.econbiz.de/10011208796

Simulating soil water regime in lowland paddy fields under different water managements using HYDRUS-1D

Tan, Xuezhi; Shao, Dongguo; Liu, Huanhuan - In: Agricultural Water Management 132 (2014) C, pp. 69-78

The widely adopted alternate wetting and drying (AWD) irrigation for rice production in lowland paddy fields with shallow groundwater table is increasingly needed to quantify the soil water regime for irrigation schedule design. Field experiments were conducted to compare the soil water flow...

Persistent link: https://www.econbiz.de/10011047772

Evaluation of water movement and water losses in a direct-seeded-rice field experiment using Hydrus-1D

Li, Yong; Šimůnek, Jirka; Jing, Longfei; Zhang, Zhentin; … - In: Agricultural Water Management 142 (2014) C, pp. 38-46

In the recent decade, increasing costs of labor, water, and fertilizers around the world led to a change in the method of crop establishment from traditional transplanted rice (TPR) to direct-seeded rice (DSR) and to a substantial rise in the DSR-managed area. Since water management in areas...

Persistent link: https://www.econbiz.de/10011047776

Irrigation return flow and nitrate leaching under different crops and irrigation methods in Western Mediterranean weather conditions

Poch-Massegú, R.; Jiménez-Martínez, J.; Wallis, K.J.; … - In: Agricultural Water Management 134 (2014) C, pp. 1-13

development for climatic reasons. In the current work, percolation and N leaching from different crops (corn, potato, and rotation … applied water for corn, potato, and rotation of lettuce and melon, respectively. Also, high N leaching values across all … prevention on potato crops and plastic cover for melon crops, played a very important role for both percolation and N leaching …

Persistent link: https://www.econbiz.de/10011047918

Evaluation of nitrogen balance in a direct-seeded-rice field experiment using Hydrus-1D

Li, Yong; Šimůnek, Jirka; Zhang, Zhentin; Jing, Longfei; … - In: Agricultural Water Management 148 (2015) C, pp. 213-222

Nitrogen (N) pollution is a global environmental problem that has greatly increased the risks of both the eutrophication of surface waters and contamination of ground waters. The majority of N pollution mainly comes from agricultural fields, in particular during rice growing seasons. In recent...

Persistent link: https://www.econbiz.de/10011116770

Field analysis of water and nitrogen fate in lowland paddy fields under different water managements using HYDRUS-1D

Tan, Xuezhi; Shao, Dongguo; Gu, Wenquan; Liu, Huanhuan - In: Agricultural Water Management 150 (2015) C, pp. 67-80

With the wide adoption of alternate wetting and drying (AWD) irrigation for rice production, the water and nitrogen (N) fate in lowland paddy fields under AWD irrigation was needed to be investigated for assessing the water saving and environmental effects of AWD, compared to traditional...

Persistent link: https://www.econbiz.de/10011190086

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