Modeling the Risk of the Salt for Polluting Groundwater Irrigation with Recycled Water and Ground Water Using HYDRUS-1 D

Shang, Fangze; Ren, Shumei; Yang, Peiling; Li, Changsheng; Xue, Yandong; Huang, Lingmiao

doi:10.1007/s11270-016-2875-2

Cited by 10 publications

(8 citation statements)

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“…In the last few decades, analytical and numerical models have been developed to predict the effects of irrigation water quality on soil [23,24]. HYDRUS, as one such model, is used to simulate not only soil water and salt flux but also to analyze the impact of meteorological, soil and management conditions as well Water 2017, 9, 536 3 of 19 as brackish water irrigation on soil [25][26][27][28]. Using HYDRUS-1D to analyze the effect of different salt concentrations in irrigation water on salt transport, Goncalves et al [29] showed that although low concentrations of brackish water (with a conductivity of 1.6 dS/m) caused no surface soil salinization, soil salinity, however, increased with increasing concentration of brackish water.…”

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confidence: 99%

HYDRUS Simulation of Sustainable Brackish Water Irrigation in a Winter Wheat-Summer Maize Rotation System in the North China Plain

Yang

et al. 2017

Water

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Freshwater resources in the North China Plain (NCP) are near depletion due to the unceasing overexploitation of deep groundwater, by far the most significant source of freshwater in the region. To deal with the deepening freshwater crisis, brackish water (rich but largely unused water in agriculture) is increasingly being used in irrigation in the region. However, inappropriate irrigation with brackish water could lead to soil salinization and cropland degradation. To evaluate such negative impacts, the HYDRUS-1D model was used to simulate soil salt transport and accumulation under 15 years of irrigation with brackish water. The irrigation scenarios included brackish water irrigation during the wintering and jointing stages of winter wheat and then freshwater irrigation just before the sowing of summer maize. Freshwater irrigation was done to leach out soil salts, which is particularly vital in dry years. For the littoral region of the plain, HYDRUS-ID was used to simulate the irrigated cropping system stated above for a total period of 15 years. The results showed that it was feasible to use brackish water twice in one year, provided freshwater irrigation was performed before sowing summer maize. Freshwater irrigation, in conjunction with precipitation, leached out soil salts from the 100 cm root-zone depth. The maximum salt accumulation was in the 160-220 cm soil layer, which ensured that root-zone soil was free of restrictive salinity for crop growth. Precipitation was a critical determinant of the rate and depth leaching of soil salt. Heavy rainfall (>100 mm) caused significant leaching of soluble salts in the 0-200 cm soil profile. Salt concentration under brackish water irrigation had no significant effect on the variations in the trend of soil salt transport in the soil profile. The variations of soil salinity were mainly affected by hydrological year type, for which the buried depth of soil salt was higher in wet years than in dry years. The study suggested that 15 years of irrigation with brackish water is a reliable and feasible mode of crop production in coastal regions with a thick soil column above the water table. The scheme proposed in this study allowed the use of brackish water in irrigation without undue salinization of the crop soil layer, an intuitive way of resolving the deepening water crisis in the NCP study area and beyond.

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confidence: 99%

HYDRUS Simulation of Sustainable Brackish Water Irrigation in a Winter Wheat-Summer Maize Rotation System in the North China Plain

Yang

et al. 2017

Water

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“…In arid and semi-arid regions, soil salinization and water shortages have become a serious threat to food safety from cultivated land because of scarce rainfall, strong evaporation, unreasonable use of water resources, and unfavorable drainage conditions [1][2][3][4]. In the short term, the use of irrigation water with high TDS concentration in these areas can: 1) cause soil salinization and soil pore clogging [5], 2) reduce soil permeability [6], and 3) affect the stability of soil structure and change the physical and chemical properties of soil [7].…”

Section: Introductionmentioning

confidence: 99%

Soil Water and Salt Transport and its Influence on Groundwater Quality: A Case Study in the Kongque River Region of China

Dong¹,

Wen²,

Zhang³

et al. 2019

Pol. J. Environ. Stud.

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Unreasonable exploitation of groundwater resources in the Kongque River region has led to a decline in the groundwater table, groundwater salinization, and other geo-environmental problems. Therefore, this study supplements the studies on soil water and salt transport in the Kongque River region, and provides a new method for the prevention of groundwater salinization in arid and semiarid regions. In this study, soil column experiments were carried out to investigate the influence of lithological structures of the unsaturated zone, water quality, and methods of irrigation on soil water and salt transport. Based on the data from the experiment, a one-dimensional model of soil water and salt transport was built to predict the impact of long-term irrigation on groundwater quality using Hydrus-1D. The results showed that groundwater TDS increased in the predicted scenarios and that groundwater quality was greatly influenced by irrigation water with high TDS values. The influence of long-term irrigation on groundwater quality was smallest for drip irrigation, which can save water and should be promoted. The influence of irrigation on groundwater quality was largest for flood irrigation. If flood irrigation cannot be avoided, then it is recommended that water with a TDS below 2 g/L should be used.

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“…Moreover, heavy metals are found to potentially enrich in corps and pose health risk to humans [21,22]. Long-term irrigation with wastewater and reclaimed water also leads to pollutants transfer downward [23], threatening the groundwater quality and enhancing the complexity of groundwater chemistry governing mechanisms [9,12]. Therefore, understanding groundwater hydrogeochemical characteristics and their controlling factors in wastewater and reclaimed water used area is essential for managing and protecting groundwater quality and providing guidance for the usage of wastewater and reclaimed water.…”

Section: Introductionmentioning

confidence: 99%

“…More than 2 × 10 8 m 3 of reclaimed water has been used for agricultural purpose since 2008 [12]. Reclaimed water is also widely used as landscape water to recover wetlands and dry rivers.…”

Section: Introductionmentioning

confidence: 99%

“…Considering the chemical composition of reclaimed water in Beijing [14,24], groundwater is potentially polluted by salt, nitrogen, heavy metals and organic pollutants. Previous research demonstrated that heavy metals and organic pollutants have low possibilities to constitute pollution to groundwater [14,17,25,26], but salt and nitrogen pollutants should be paid extra attention [12,27]. Although scholars have reported the spatial variation of groundwater quality in terms of salt and nitrogen pollutants [26,27], and also discussed the influences caused by the leakage of reclaimed water river on soil and groundwater quality in long-term wastewater and reclaimed water use areas in Beijing [9,14,15].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Geochemical Characteristics and Controlling Processes of Groundwater in a Typical Long-Term Reclaimed Water Use Area

Xiao

Yin

et al. 2017

Water

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Abstract:The usage of reclaimed water can efficiently mitigate water crises, but it may cause groundwater pollution. To clearly understand the potential influences of long-term reclaimed water usage, a total of 91 samples of shallow and deep groundwater were collected from a typical reclaimed water use area during the dry and rainy seasons. The results suggest both shallow and deep groundwater are mainly naturally alkaline freshwater, which are composed mainly of Ca-HCO 3 , followed by mixed types such as Ca-Na-HCO 3 and Ca-Mg-HCO 3 . A seasonal desalination trend was observed in both shallow and deep aquifers due to dilution effects in the rainy season. Groundwater chemical compositions in both shallow and deep aquifers are still dominantly controlled by natural processes such as silicate weathering, minerals dissolution and cation exchange. Human activities are also the factors influencing groundwater chemistry. Urbanization has been found responsible for the deterioration of groundwater quality, especially in shallow aquifers, because of the relative thin aquitard. Reclaimed water usage for agricultural irrigation and landscape purposes has nearly no influences on groundwater quality in rural areas due to thick aquitards. Therefore, reclaimed water usage should be encouraged in arid and semiarid areas with proper hydrogeological condition.

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Modeling the Risk of the Salt for Polluting Groundwater Irrigation with Recycled Water and Ground Water Using HYDRUS-1 D

Cited by 10 publications

References 50 publications

HYDRUS Simulation of Sustainable Brackish Water Irrigation in a Winter Wheat-Summer Maize Rotation System in the North China Plain

HYDRUS Simulation of Sustainable Brackish Water Irrigation in a Winter Wheat-Summer Maize Rotation System in the North China Plain

Soil Water and Salt Transport and its Influence on Groundwater Quality: A Case Study in the Kongque River Region of China

Investigation of Geochemical Characteristics and Controlling Processes of Groundwater in a Typical Long-Term Reclaimed Water Use Area

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