Agricultural drought characteristics in a typical plain region considering irrigation, crop growth, and water demand impacts

Zhang, Yuliang; Wu, Zhiyong; Singh, Vijay P.; Lin, Qian; Ning, Shaowei; Zhou, Yuliang; Jin, Juliang; Zhou, Rongxing; Ma, Qiang

doi:10.1016/j.agwat.2023.108266

Cited by 8 publications

(3 citation statements)

References 44 publications

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“…Origin 2018 was used for graphs. The coefficient of determination (R 2 ) and the coefficient of determination (r) [36,37] were selected as assessment indicators to evaluate the accuracy of the empirical model developed in this study. The closer the R 2 is to 1, the higher the accuracy of the fitting model.…”

Section: Discussionmentioning

confidence: 99%

Infiltration and Leaching Characteristics of Soils with Different Salinity under Fertilizer Irrigation

Zhu,

Zheng,

Zhong

et al. 2024

Agronomy

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Salt and nutrient transport and transformations during water infiltration directly influence saline soil improvement and the efficient use of water and fertilizer resources. The effects of soil initial salinity (18.3 g/kg, 25.5 g/kg, 42.2 g/kg, 79.94 g/kg, and 165 g/kg, respectively, labeled S1 to S5) on the infiltration and leaching characteristics of water, salt, and nitrogen were analyzed via a one-dimensional vertical fertilizer infiltration experiment. Meanwhile, the estimation models of cumulative infiltration and wetting front, including the effect of soil initial salinity, were established. The results showed that, with the increase in soil initial salinity, the cumulative infiltration within the same time decreased, and the migration time of wet front to 45 cm was longer. The time required for S5 to reach the preset cumulative infiltration was more than six times that of S1, and, for the wet front migration to 45 cm, the time requirement for S5 was about four times that of S1. In the established Kostiakov model and wetting front model, the coefficients all decreased with the increase in soil initial salinity, and the test index R2 values both reached 0.999. In the Kostiakov model, coefficient K had a linear relationship with the natural logarithm of initial soil salt content, while index a had a direct linear relationship with initial soil salt content. The cumulative leachate volume decreased with the increase in soil initial salinity, and the corresponding data of S3 and S5 were reduced by 37% and 57.3%, respectively, compared with S1. The electrical conductivity values of S1, S3, and S5 were 15.4, 209.8, and 205.6 ms/cm, respectively, being affected by the initial content in soil, soil moisture transport rate, and exogenous potassium nitrate (KNO3) addition. The NO3−-N concentrations in the leachates of S1, S3, and S5 at the end of leaching were 55.26, 16.17, and 3.2 mg/L, respectively. Based on the results of this study, for soil with high initial salinity, the conventional irrigation amount (2250 m3/ha) of the general soil in the study area could not meet the requirements of leaching salt. These results can provide a reference for the formulation of irrigation and fertilization strategies for soils with different salinity and contribute to the sustainable development of saline soil agriculture and the ecological environment.

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Section: Discussionmentioning

confidence: 99%

Infiltration and Leaching Characteristics of Soils with Different Salinity under Fertilizer Irrigation

Zhu,

Zheng,

Zhong

et al. 2024

Agronomy

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“…In recent years, expedited population growth and the resulting boosted requirement for food, housing, employment, and land have led to more ecological problems ( Kooch et al, 2022 ), especially the decline of the ground water level ( Maihemuti et al, 2021 ). As the temperature increases in the future, the potential enhancement in evapotranspiration will be more pronounced than that of precipitation, leading to more water shortage and exacerbating desertification or desertification in this region ( Dai and Zhao, 2017 ; Su et al, 2018 ; Zhang Y. et al, 2023 ). The future changes in climate conditions may enhance the vulnerability of sandy ecosystems and strongly impact the biotic and abiotic processes in the soil environment.…”

Section: Introductionmentioning

confidence: 99%

Impact of altered groundwater depth on soil microbial diversity, network complexity and multifunctionality

Zhao,

et al. 2023

Front. Microbiol.

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Understanding the effects of groundwater depth on soil microbiota and multiple soil functions is essential for ecological restoration and the implementation of groundwater conservation. The current impact of increased groundwater levels induced by drought on soil microbiota and multifunctionality remains ambiguous, which impedes our understanding of the sustainability of water-scarce ecosystems that heavily rely on groundwater resources. This study investigated the impacts of altered groundwater depths on soil microbiota and multifunctionality in a semi-arid region. Three groundwater depth levels were studied, with different soil quality and soil moisture at each level. The deep groundwater treatment had negative impacts on diversity, network complexity of microbiota, and the relationships among microbial phylum unites. Increasing groundwater depth also changed composition of soil microbiota, reducing the relative abundance of dominant phyla including Proteobacteria and Ascomycota. Increasing groundwater depth led to changes in microbial community characteristics, which are strongly related to alterations in soil multifunctionality. Overall, our results suggest that groundwater depth had a strongly effect on soil microbiota and functionality.

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“…Climate change also affects forest hydrologic systems, and the effects of climate change on water quality are unclear. Warmer climates will almost certainly result in more fires, accompanying erosion, and more frequent high-intensity downpour events[24].…”

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confidence: 99%

F.J Mock Method For Hydrological Moel In Water Reliability Study In Leuwi Padjadjaran II Reservoir

Soerya,

Asdak,

Kendarto

et al. 2023

JAZ

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Padjadjaran University built the Leuwi Padjadjaran II Reservoir as a water harvesting facility and conservation area in the Cikeruh Sub-watershed area. This reservoir serves as a water reservoir before being channelled to other river branches and can be utilized as a water reserve collector. The water supply and the degree of water demand in the residential, non-domestic, agricultural, fishery, animal, and industrial sectors are impacted by land use changes and climate changes. This study aims to ascertain the state of the water balance in the Leuwi Padjadjaran II Catchment Area to know the deficit condition and calculate the reservoir serve. F.J. Mock Method was used to examine water availability based on climatology data. SNI 6728.1-2015, PUPR Minister Circular Letter (SE PUPR) Number 7 of 2018, and associated studies were used to analyze water demand. The findings revealed that total water demand was 133.506,09 m 3 /year with an average of 11.125,5 m 3 /month, and total water supply was 138.732,90 m 3 /year with an average of 11.561,08 m 3 /month. Throughout January-May and November-December, the water balance in the Leuwi Padjadjaran II Catchment Area was in surplus. Deficient water balance conditions occur from June-October, requiring water supply. Leuwi Padjadjaran II Catchment Area has a surplus of water, so it is sufficient to be utilized. Still, it is not evenly distributed, so there is a water shortage in several sectors, such as agriculture. To make the Leuwi Padjadjaran II Reservoir useful, conservation measures must be taken to manage the water demand.

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Agricultural drought characteristics in a typical plain region considering irrigation, crop growth, and water demand impacts

Cited by 8 publications

References 44 publications

Infiltration and Leaching Characteristics of Soils with Different Salinity under Fertilizer Irrigation

Infiltration and Leaching Characteristics of Soils with Different Salinity under Fertilizer Irrigation

Impact of altered groundwater depth on soil microbial diversity, network complexity and multifunctionality

F.J Mock Method For Hydrological Moel In Water Reliability Study In Leuwi Padjadjaran II Reservoir

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