scholarly journals An analysis on the influence of precipitation infiltration on groundwater under different irrigation conditions in the semi-arid area

2021 ◽  
Author(s):  
Long Yan ◽  
Min-jian Chen ◽  
Peng Hu ◽  
Di-li Li ◽  
Yong Wang
Keyword(s):  
Drip Irrigation ◽  
Arid Area ◽  
Rainfall Infiltration ◽  
Groundwater Depth ◽  
In Situ Observation ◽  
Groundwater Extraction ◽  
Flood Irrigation ◽  
The Impact ◽  
Semi Arid ◽  
Mulched Drip Irrigation

Abstract The West Liaohe Plain is a typical semi-arid area, where the process of rainfall infiltration to replenish groundwater is a key link in its vertical hydrological cycle. In this paper, we compare and analyze the impact upon soil moisture movement and water infiltration after the shift of irrigation method from flood irrigation to mulched drip irrigation under mulch through setting up in-field in-situ observation points and carrying out groundwater depth dynamic observation. The results show that compared with mulched drip irrigation under mulch, flood irrigation has a stronger response to rainfall infiltration and a quicker response time in the rise of underground depth. With the decrease of groundwater level, the effect of rainfall infiltration to replenish groundwater is significantly weakened. In the flood irrigation area, the groundwater depth at about 8 m already has no obvious response to a small amount of rainfall. However, the groundwater depth at 6 m in the area of mulched drip irrigation under mulch already has no response to rainfall. Therefore, when groundwater extraction is carried out in irrigation areas, reasonable groundwater extraction levels should be designated in light of different irrigation methods to maintain the sustainable utilization of groundwater.

Relative impact of irrigation techniques and climate change on hydroclimatic regimes in the Mediterranean region

2021 ◽  
Author(s):  
Sandra Pool ◽  
Félix Francés ◽  
Alberto Garcia-Prats ◽  
Manuel Pulido-Velazquez ◽  
Carles Sanichs-Ibor ◽  
...  
Keyword(s):  
Climate Change ◽  
Impact Assessment ◽  
Drip Irrigation ◽  
Mediterranean Region ◽  
Control Period ◽  
Irrigated Agriculture ◽  
Flood Irrigation ◽  
The Mediterranean ◽  
Projected Changes ◽  
The Impact

<p>Irrigated agriculture is the major water consumer in the Mediterranean region. Improved irrigation techniques have been widely promoted to reduce water withdrawals and increase resilience to climate change impacts. In this study, we assess the impact of the ongoing transition from flood to drip irrigation on future hydroclimatic regimes in the agricultural areas of Valencia (Spain). The impact assessment is conducted for a control period (1971-2000), a near-term future (2020-2049) and a mid-term future (2045-2074) using a chain of models that includes five GCM-RCM combinations, two emission scenarios (RCP 4.5 and RCP 8.5), two irrigation scenarios (flood and drip irrigation), and twelve parameterizations of the hydrological model Tetis. Results of this modelling chain suggest considerable uncertainties regarding the magnitude and sign of future hydroclimatic changes. Yet, climate change could lead to a statistically significant decrease in future groundwater recharge of up -6.6% in flood irrigation and -9.3% in drip irrigation. Projected changes in actual evapotranspiration are as well statistically significant, but in the order of +1% in flood irrigation and -2.1% in drip irrigation under the assumption of business as usual irrigation schedules. The projected changes and the related uncertainties will pose a challenging context for future water management. However, our findings further indicate that the effect of the choice of irrigation technique may have a greater impact on hydroclimate than climate change alone. Explicitly considering irrigation techniques in climate change impact assessment might therefore be a way towards better informed decision-making.</p><p>This study has been supported by the IRRIWAM research project funded by the Coop Research Program of the ETH Zurich World Food System Center and the ETH Zurich Foundation, and by the ADAPTAMED (RTI2018-101483-B-I00) and TETISCHANGE (RTI2018-093717-B-I00) research projects funded by the Ministerio de Economia y Competitividad (MINECO) of Spain including EU FEDER funds.</p>

Performance of partial root-zone drip irrigation for sugar beet production in a semi-arid area

2016 ◽  
Vol 176 ◽  
pp. 180-190 ◽  
Author(s):  
Ramazan Topak ◽  
Bilal Acar ◽  
Refik Uyanöz ◽  
Ercan Ceyhan
Keyword(s):  
Sugar Beet ◽  
Drip Irrigation ◽  
Root Zone ◽  
Arid Area ◽  
Semi Arid

Analysis of deficit irrigation strategies by using SUBSTOR-Potato model in a semi-arid area

2019 ◽  
Vol 157 (7-8) ◽  
pp. 578-591 ◽  
Author(s):  
F. Montoya ◽  
D. Camargo ◽  
J. I. Córcoles ◽  
A. Domínguez ◽  
J. F. Ortega
Keyword(s):  
Deficit Irrigation ◽  
Water Productivity ◽  
Model Performance ◽  
Arid Area ◽  
Point Of View ◽  
Tuber Initiation ◽  
Regulated Deficit Irrigation ◽  
The Impact ◽  
Irrigation Levels ◽  
Semi Arid

AbstractIn areas where water is scarce, the use of regulated deficit irrigation, combined with decision support system tools, may decrease the impact of agriculture on natural water resources, as well as on energy consumption, thereby improving the profitability of farms. With this aim, the SUBSTOR-Potato model (incorporated in the DSSAT Program) was evaluated with a 2-year field test (2011 and 2012) conducted in a semi-arid area (Albacete, Spain) applying four irrigation levels (120, 100, 80 and 60% of irrigation requirements). Subsequently, the model was used for simulating the potato yield under several deficit irrigation strategies (ISs) during 30 years of a semi-arid climate (1988–2017) and determining the most profitable option. The considered ISs were deemed those most suitable from the yield and water productivity point of view by some authors. The model performance for tuber yield was satisfactory with an index of agreement >0.91 and errors between 0.71 and 3.06 × 103 kg/ha. The ISs simulated with SUBSTOR-Potato showed that slight deficit irrigation (5–10%) may increase the water productivity and profitability of the farms. Moreover, tuber formation (from onset of tuber initiation to harvest) was shown to be the most sensitive stage, therefore it is highly recommended to avoid deficit during this stage, which would cause a large reduction in yield (around 8 t/ha, depending on the level of deficit suffered by the crop).

scholarly journals Assessing Growth and Water Productivity for Drip-Irrigated Maize under High Plant Density in Arid to Semi-Humid Climates

Agriculture ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 97
Author(s):  
Feng Wang ◽  
Jun Xue ◽  
Ruizhi Xie ◽  
Bo Ming ◽  
Keru Wang ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
Plant Density ◽  
Water Productivity ◽  
Growth And Yield ◽  
Planting Density ◽  
Arid Areas ◽  
High Plant Density ◽  
Aquacrop Model ◽  
Semi Arid ◽  
Mulched Drip Irrigation

Determining the water productivity of maize is of great significance for ensuring food security and coping with climate change. In 2018 and 2019, we conducted field trials in arid areas (Changji), semi-arid areas (Qitai) and semi-humid areas (Xinyuan). The hybrid XY335 was selected for the experiment, the planting density was 12.0 × 104 plants ha−1, and five irrigation amounts were set. The results showed that yield, biomass, and transpiration varied substantially and significantly between experimental sites, irrigation and years. Likewise, water use efficiency (WUE) for both biomass (WUEB) and yield (WUEY) were affected by these factors, including a significant interaction. Normalized water productivity (WP*) of maize increased significantly with an increase in irrigation. The WP* for film mulched drip irrigation maize was 37.81 g m−2 d−1; it was varied significantly between sites and irrigation or their interaction. We conclude that WP* differs from the conventional parameter for water productivity but is a useful parameter for assessing the attainable rate of film-mulched drip irrigation maize growth and yield in arid areas, semi-arid areas and semi-humid areas. The parametric AquaCrop model was not accurate in simulating soil water under film mulching. However, it was suitable for the prediction of canopy coverage (CC) for most irrigation treatments.

scholarly journals Impacts of groundwater extraction on salinization risk in a semi-arid floodplain

2013 ◽  
Vol 13 (12) ◽  
pp. 3405-3418 ◽  
Author(s):  
S. Alaghmand ◽  
S. Beecham ◽  
A. Hassanli
Keyword(s):  
Saline Water ◽  
Water Flux ◽  
Significant Risk ◽  
South Australia ◽  
Catchment Management ◽  
Groundwater Extraction ◽  
Saline Groundwater ◽  
Groundwater Flux ◽  
The Impact ◽  
Semi Arid

Abstract. In the lower River Murray in Australia, a combination of a reduction in the frequency, duration and magnitude of natural floods, rising saline water tables in floodplains, and excessive evapotranspiration have led to an irrigation-induced groundwater mound forcing the naturally saline groundwater onto the floodplain. It is during the attenuation phase of floods that these large salt accumulations are likely to be mobilised and discharged into the river. This has been highlighted as the most significant risk in the Murray–Darling Basin and the South Australian Government and catchment management authorities have subsequently developed salt interception schemes (SIS). The aim of these schemes is to reduce the hydraulic gradient that drives the regional saline groundwater towards the River Murray. This paper investigates the interactions between a river (River Murray in South Australia) and a saline semi-arid floodplain (Clark's floodplain) that is significantly influenced by groundwater lowering due to a particular SIS. The results confirm that groundwater extraction maintains a lower water table and a higher amount of fresh river water flux to the saline floodplain aquifer. In terms of salinity, this may lead to less solute stored in the floodplain aquifer. This occurs through three mechanisms, namely extraction of the solute mass from the system, reducing the saline groundwater flux from the highland to the floodplain and changing the floodplain groundwater regime from a losing to a gaining one. It is shown that groundwater extraction is able to remove some of the solute stored in the unsaturated zone and this can mitigate the floodplain salinity risk. A conceptual model of the impact of groundwater extraction on floodplain salinization has been developed.

Influence of mulched drip irrigation on landscape scale evapotranspiration from farmland in an arid area

2020 ◽  
Vol 230 ◽  
pp. 105953
Author(s):  
Zhenyu Zhang ◽  
Xiaoyu Li ◽  
Lijuan Liu ◽  
Yugang Wang ◽  
Yan Li
Keyword(s):  
Drip Irrigation ◽  
Landscape Scale ◽  
Arid Area ◽  
Mulched Drip Irrigation

Soil salt distribution under mulched drip irrigation in an arid area of northwestern China

2014 ◽  
Vol 104 ◽  
pp. 23-33 ◽  
Author(s):  
Zhi Zhang ◽  
Hongchang Hu ◽  
Fuqiang Tian ◽  
Heping Hu ◽  
Xinhua Yao ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
Arid Area ◽  
Northwestern China ◽  
Soil Salt ◽  
Salt Distribution ◽  
Mulched Drip Irrigation

scholarly journals Quantifying the impact of groundwater depth on evapotranspiration in a semi-arid grassland region

2010 ◽  
Vol 7 (5) ◽  
pp. 6887-6923 ◽  
Author(s):  
M. E. Soylu ◽  
E. Istanbulluoglu ◽  
J. D. Lenters ◽  
T. Wang
Keyword(s):  
Water Table ◽  
Land Surface ◽  
Capillary Rise ◽  
Groundwater Depth ◽  
Surface Processes ◽  
Richards Equation ◽  
Land Surface Processes ◽  
South Central ◽  
The Impact ◽  
Semi Arid

Abstract. The interactions between shallow groundwater and land surface processes, mediated by capillary rise processes from groundwater, may play an important role in the ecohydrology of riparian zones in both humid and semi-arid ecosystems. Some recent land surface models (LSM) incorporate the contribution of groundwater to land surface processes with varying levels of complexity. In this paper, we examine the sensitivity of evapotranspiration at the land surface to the depth of groundwater using three models with different levels of complexity, two widely used representative soil hydraulic parameter sets, and four soil textures. The selected models are Hydrus-1D, which solves the Richards equation, the Integrated Biosphere Simulator (IBIS), which uses a multi-bucket approach with interactions between buckets, and a single-bucket model coupled with a classic simple capillary rise flux approximation. These models are first corroborated with field observations of soil moisture and groundwater elevation data from a site located in south-central Nebraska, USA. We then examine the sensitivity of the Richards equation to node spacing, as well as the relationship between groundwater depth and the ratio of actual to potential evapotranspiration (ET) for various soil textures and water table depths. The results show that selecting one representative soil parameter set over another may result in up to a 70% difference in actual ET (relative to the potential ET) when the depth to water table is in 0–5 m depending on the soil type. Moreover, solution type of the Richards equation and node spacing have also effect on surface ET up to 50% and 30% respectively depending on the depth-to-groundwater and node spacing. Therefore, further studies are needed to understand the sensitivities of land surface and atmospheric models to the existence of saturated layers, including studies with more field validation in regions with different climates and land cover types.

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