Evolutionary process of saline-water intrusion in Holocene and Late Pleistocene groundwater in southern Laizhou Bay

Liu, Sen; Tang, Zhonghua; Gao, Maosheng; Hou, Guohua

doi:10.1016/j.scitotenv.2017.06.262

Cited by 86 publications

(48 citation statements)

References 20 publications

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“…Concentrations of TDS ranged from 246.79 to 3858.02 mg/L with the average value of 972.27 mg/L (Table S3). Groundwater type at approximately 59.29% of sampling sites was fresh water (TDS b 1000 mg/L) according to classification criterion (Liu et al, 2017) and groundwater quality at these sites was classified into Class III representing that groundwater was suitable for drinking based on "Standard for groundwater quality (GB/T 14848-2017)". In contrast, groundwater type at approximately 38.94% of sampling sites was brackish water (1000 b TDS ≤ 3000 mg/L) while that at about 1.77% of sampling sites with shallow aquifer depth of 2-8 m was saline water (3000 b TDS ≤ 50,000 mg/L).…”

Section: Resultsmentioning

confidence: 99%

Influence of coastal groundwater salinization on the distribution and risks of heavy metals

Wen

Lü

et al. 2019

Science of The Total Environment

149

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Coastal groundwater quality significantly affects the regional sustainable development, due to the water resource shortage in coastal zone. Current studies on coastal groundwater have mainly focused on saline water intrusion and over-extraction. Information on the heavy metal pollution of coastal groundwater with salinization trend is limited. This study investigated heavy metals in groundwater from a typical coastal region with intensive anthropogenic activities and saline water intrusion. The southwestern coastal plains of the study area showed significant groundwater salinization trend. Heavy metals in the coastal groundwater mainly originated from anthropogenic activities and groundwater salinization according to principal component analysis. Relative high concentrations of As, Co, Cr, Cu, Fe, Mn, and Ni occurred in the southwestern coast of the study area with high TDS level, indicating that the concentrations of these heavy metals in shallow aquifer of the study area might be influenced by the groundwater salinization. Average concentrations of heavy metals in groundwater of the study area ranged from 0.03 (Cd) to 686.92 (Fe) μg/L. Fe was the dominant heavy metal in groundwater with the maximal concentration of 2333.76 μg/L and exceeding-standard rate reaching 98.23%. Approximately 13.27% of sampling sites showed moderate or higher heavy metal pollution of groundwater based on heavy metal pollution index. Heavy metals in groundwater exerted low ecological risks. Elements Fe, Ni, and As were the main contributors for ecological risks. Cancer risks of heavy metals for both adults and children were high at all sampling sites. Non-cancer risks for adults and children were unacceptable at 4.42% and 17.70% of sampling sites, respectively. The

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Section: Resultsmentioning

confidence: 99%

Influence of coastal groundwater salinization on the distribution and risks of heavy metals

Wen

Lü

et al. 2019

Science of The Total Environment

149

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“…To simulate the underground water in this region, brackish water was formulated with NaCl and distilled water (3 g/L salinity). Whereas, fresh water was prepared using distilled water (0 g/L) [15,16]. The irrigation amount was calculated from the field capacity using Equation (1) [17],…”

Section: Introductionmentioning

confidence: 99%

Response of Water-Salt Migration to Brackish Water Irrigation with Different Irrigation Intervals and Sequences

Zhu

Yang

Sun

et al. 2019

Water

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Establishing methods for scientific and rational use of brackish water resources is the key to farmland irrigation in the Yellow River Delta region of China. In this study, we conducted laboratory simulation experiments with soil columns and monitored the changes in water infiltration and salt distribution under eight irrigation treatments, including four intervals (0, 30, 60, and 90 min between irrigations) and two sequences (brackish-brackish-fresh water and brackish-fresh-brackish water). The results showed that the duration of water infiltration into the soil was higher under intermittent irrigation than continuous irrigation, with the highest value recorded at the 90-min irrigation interval. There was no significant difference in the mean soil water content between the brackish-brackish-fresh water (28.01–29.71%) and brackish-fresh-brackish water (28.85–29.98%) irrigation treatments. However, the mean soil desalination rate of the brackish-brackish-fresh irrigation treatment (42.51–46.83%) was higher than that of the brackish-fresh-brackish irrigation treatment (39.48–46.47%), and a much higher soil desalination rate was observed at the 90-min irrigation interval, compared with the other intervals. In conclusion, brackish-brackish-fresh water irrigation at longer time intervals (e.g., 90 min between irrigations) is conducive to reduce soil salt content in the surface soil in the study region.

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“…22 only, Table 3. On the other hand, according to Freeze and Cherry (1979) and Liu et al (2017) the groundwater samples are classified according to total dissolved salts into brackish (TDS > 1,000 mgL -1 ) and fresh (TDS < 1,000 mgL -1 ). Thus 6 % of the groundwater samples belong to the brackish class and 94 % belongs to the freshwater class, (Table 3).…”

Section: Water Salinitymentioning

confidence: 99%

Groundwater Quality Assessment for Irrigation Purposes in the West of Minia, Governorate, South Egypt b

Hegazi¹,

Abbas

Ismail³

et al. 2018

Journal of Soil Sciences and Agricultural Engineering

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This investigation has been conducted to assess the suitability of ground waters in west Minia governorate for irrigation purposes. Thirty-three groundwater samples were collected from different sites, along Assiut the West Desert Road. These samples were analyzed for water quality criteria, namely electrical conductivity (EC), soluble cations (Ca 2+ , Mg 2+ , Na + and K + ), anions (HCO 3 -, CO 3 2-, Cland SO 4 2-). The chemical parameters that control water quality such as sodium adsorption ratio (SAR), soluble sodium percent (SSP%), residual sodium carbonated (RSC), Kelley's ratio (KR), potential salinity (PS), permeability index (PI), total alkalinity, total hardness, magnesium ratio were also calculated using standard equations. Results revealed that anions contents in the studied ground waters followed the sequence: SO 4 2->Cl -> HCO 3 whereas CO -3 ion was not detected. On the other hand, the cations contents of the water samples followed the sequence: Na + > Mg 2+ > Ca 2+ > K + . In addition, the pH values of the studied water samples ranged between 6.9 and 7. 9. The analytical results indicated that 94 % of the groundwater samples can be classified as good for irrigation on bases of EC, SAR, RSC and SSP%. Both SAR and RSC values indicated no liability for sodicity hazard. However, groundwater samples had high salinity levels and low sodicity (C3-S1). Some other parameters, which were generally used for assessing water quality e.g. Irrigation Water Quality Index (IWQI) and Relative Crop Yield Potential (RCYP), were calculated. GIS was used to create a water quality database including spatial distribution map for each parameter. The results obtained herein showed that about 21 % of the groundwater samples belong to No Restriction category (NR) while about 79 % from the total samples belong to the Low Restriction (LR) category. According to the RYPC values calculated for some crops that can be cultivated using the investigated waters, the following sequence is obtained: sugar beet (94) > wheat (74) > corn (33) > bean (13). Thus, it can be concluded that the studied groundwater can successfully be used for irrigation with special salinity control management i.e. leaching requirements and salt tolerant plants.

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Evolutionary process of saline-water intrusion in Holocene and Late Pleistocene groundwater in southern Laizhou Bay

Cited by 86 publications

References 20 publications

Influence of coastal groundwater salinization on the distribution and risks of heavy metals

Influence of coastal groundwater salinization on the distribution and risks of heavy metals

Response of Water-Salt Migration to Brackish Water Irrigation with Different Irrigation Intervals and Sequences

Groundwater Quality Assessment for Irrigation Purposes in the West of Minia, Governorate, South Egypt b

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