Hydrochemical characteristics and salinization processes of groundwater in the shallow aquifer of Eastern Laizhou Bay, China

Wen, Xin; Diao, Meina; De, Wang; Gao, Meng

doi:10.1002/hyp.8362

Cited by 28 publications

(14 citation statements)

References 40 publications

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“…A hydrochemical map can directly show the chemical characteristics of water [39,40]. A piper trilinear diagram is composed of two triangles of the anion in the lower part and a diamond in the upper part; it was used in this study to build a hydrochemical map of groundwater.…”

Section: Data Processing Methodsmentioning

confidence: 99%

Relationship between Soil Salinization and Groundwater Hydration in Yaoba Oasis, Northwest China

Cui

Zheng

et al. 2019

Water

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Precipitation is scarce and evaporation is intense in desert areas. Groundwater is used as the main water source to develop agriculture in the oases. However, the effects of using groundwater on the ecological environment elicit widespread public concern. This study investigated the relationship between soil salinity and groundwater characteristics in Yaoba Oasis through in situ experiments. The relationship of the mineral content, pH, and main ion content of groundwater with soil salt was quantitatively evaluated through a gray relational analysis. Four main results were obtained. First, the fresh water area with low total dissolved solid (TDS) was usually HCO3− or SO42− type water, and salt water was mostly Cl− and SO42−. The spatial distribution of main ions in groundwater during winter irrigation in November was basically consistent with that during spring irrigation in June. However, the spatial distribution of TDS differed in the two seasons. Second, soil salinization in the study area was severe, and the salinization rate reached 72.7%. In this work, the spatial variability of soil salinization had a relatively large value, and the values in spring were greater than those in autumn. Third, the soil in the irrigated area had a high salt content, and the salt ion content of surface soil was higher than that of subsoil. A piper trilinear diagram revealed that Ca2+ and K+ + Na+ were the main cations. SO42−, Cl−, and HCO3− were the main anions, and salinization soil mainly contained SO42−. Fourth, the changes in soil salt and ion contents in the 0–10 cm soil layer were approximately similar to those of irrigation water quality, both of which showed an increasing trend. The correlation of surface soil salinity with the salinity of groundwater and its chemical components was high. In summary, this study identified the progress of irrigation water quality in soil salinization and provided a scientific basis for improving the oasis ecosystem, maintaining the healthy development of agriculture, managing oasis water resources, and policy development. Our findings can serve as a reference for other, similar oasis research.

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Section: Data Processing Methodsmentioning

confidence: 99%

Relationship between Soil Salinization and Groundwater Hydration in Yaoba Oasis, Northwest China

Cui

Zheng

et al. 2019

Water

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“…Ions like Na and Cl have a definite role in the evaluation of salinization process in the coastal regions (Wen et al 2011;Shammas and Jacks 2007). Based on this common principle, the Na and Cl concentrations were drawn in a bivariate plot with a theoretical mixing line of freshwater and saline water (see Fig.…”

Section: Source Evaluation Of Critical Hydrochemical Parametersmentioning

confidence: 99%

“…The origin of Ca, Mg, HCO 3 and SO 4 will have a close relation if they are originated from dissolution of carbonate minerals (Wen et al 2011). In their common origin, the groundwater samples will be plotted on or close to the Ca ?…”

Section: Source Evaluation Of Critical Hydrochemical Parametersmentioning

confidence: 99%

Deciphering the groundwater–saline water interaction in a complex coastal aquifer in South India using statistical and hydrochemical mixing models

Kumar

2016

Model. Earth Syst. Environ.

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Hydrogeochemical investigations were carried out in a coastal aquifer along the East coast of Cuddalore district in Tamil Nadu, Southern India, to analyse the groundwater-seawater interactions. Multiple techniques including Hydrochemical Facies Evaluation Diagram (HFE-D), principle component analysis (PCA), ionic ratios, hydrochemical ionic changes models and salinity mixing index (SMI) models were applied to refine the results and exactly understand the salinization process. EC and Ionic constituents along with the Gibbs plot showed controls of evaporation and the rock-water interaction o hydrogeochemistry, which is later proved by the bivariate plots. Major ions listed under PC1 (Na, Mg, Cl and SO 4 ) and PC2 (Ca, HCO 3 , and CO 3 ) showing the influence of seawater and carbonate dissolution processes go together with cation exchange. Definitive results, shown by HFE-D plot than the piper plot, indicate that 58% of the samples either completely fall in the seawater zone or on the mixing line. Results of the ionic changes calculation indicate that 6 wells (50%) have a positive seawater fraction in the groundwater. Analogous results were observed for the SMI values ([1) in these wells, except in sample number 3. Encouragingly, after each method the results significantly rectified. Impact of seawater mixing with fresh groundwater is found in the entire starch (perpendicular to coast) of samples in the southern end of the aquifer, and samples located in very near to the coast in the central part. Good quality groundwater in the northern end indicate that the aquifer was unaffected by the seawater mixing.

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“…Upper aquifers are in close hydraulic connection with lower aquifers due to a large amount of borehole withdrawal and "deposit windows.'' The detailed information on the hydrology of the study area refers to Wen et al (2012).…”

Section: Study Areamentioning

confidence: 99%

“…In addition, mineralization of soil organic N was another nitrate source of the groundwater. Due to the sea-water intrusion, soil salinization is serious in this region (Wen et al 2012). In order to increase the soil organic matter content and control saline-alkali soil, straw and stalks of crops are widely reused in the study area (Jia et al 2010) to cause increased soil organic N content.…”

Section: Contribution Of Different Nitrate Sources Determined By Siarmentioning

confidence: 99%

Risk assessment and source identification of coastal groundwater nitrate in northern China using dual nitrate isotopes combined with Bayesian mixing model

Wen

Feng

Lü

et al. 2017

Human and Ecological Risk Assessment: An International Journal

Self Cite

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Due to the intensive and complicated human activities, the identification of nitrate pollution source of coastal aquifer is usually a challenge. This study firstly adopted stable isotope technique and stable isotope analysis in R (SIAR) model to identify the nitrate sources and contribution proportions of different sources in typical coastal groundwater of northern China. The results showed that about 91.5% of the groundwater samples illustrated significantly high nitrate concentrations exceeding the maximum WHO drinking water standard (50 mg/l), reflecting the high risk of groundwater nitrate pollution in the coastal area. A total of 57 sampling sites were classified into three groups according to hierarchical cluster analysis (HCA). The d 15 N-NO 3 ¡ and d 18 O-NO 3 ¡ values of groundwater samples from Group C (including nine samples) were much higher than those from Group A (including 40 samples) and Group B (including 8 samples). SIAR results showed that NH 4 C fertilizer was the dominant nitrate source for groundwater samples of Groups A and B while manure and sewage (M&S) served as dominant source for Group C. This study provided essential information on the high risk and pollution sources of coastal groundwater nitrate of northern China.

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Hydrochemical characteristics and salinization processes of groundwater in the shallow aquifer of Eastern Laizhou Bay, China

Cited by 28 publications

References 40 publications

Relationship between Soil Salinization and Groundwater Hydration in Yaoba Oasis, Northwest China

Relationship between Soil Salinization and Groundwater Hydration in Yaoba Oasis, Northwest China

Deciphering the groundwater–saline water interaction in a complex coastal aquifer in South India using statistical and hydrochemical mixing models

Risk assessment and source identification of coastal groundwater nitrate in northern China using dual nitrate isotopes combined with Bayesian mixing model

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