Spatial variability, source identification, and partitioning of groundwater constituents in a typical lakeside plain on Yungui Plateau

Process Safety and Environmental Protection, Год журнала: 2024, Номер unknown

Опубликована: Окт. 1, 2024

Язык: Английский

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Hydrogeochemical features, genesis, and quality appraisal of confined groundwater in a typical large sedimentary plain

Water Environment Research, Год журнала: 2024, Номер 96(8)

Опубликована: Авг. 1, 2024

Abstract The confined groundwater of arid sedimentary plains has been disturbed by long‐term anthropogenic extraction, and its hydrochemical quality is required for sustainable development. present research investigates the characteristics, formation, potential health threats, suitability in central North China Plain. Results show that a slightly alkaline nature study area, predominantly dominated fresh‐soft Cl‐Na HCO 3 ‐Na types. Water chemistry governed water–rock interactions, including dissolution evaporites cation exchange. Approximately 97% sampled groundwaters exceed prescribed standard F − . It mainly due to geological factors such as mineral dissolution, exchange, competitive adsorption may also be released from compacted soils because extraction. Enriched can pose an intermediate higher non‐carcinogenic risk more than 90% population. poses greatest threat population north‐eastern part especially infants children. For development, use irrigation area should avoided, attention paid soil salinization infiltration risks. In are found excellent or good domestic purposes based on Entropy‐weighted Quality Index. However, caused high contents cannot ignored. Therefore, it recommended differential water supplies implemented according spatial heterogeneity ensure scientific rational resources. Practitioner Points hydrochemistry plain extraction was investigated. multiple drinking were evaluated. characteristics formation mechanism under influence revealed.

Язык: Английский

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Geochemical fingerprints, evolution, and driving forces of groundwater in an alpine basin on Tibetan Plateau: Insights from unsupervised machine learning and objective weight allocation approaches

Journal of Hydrology Regional Studies, Год журнала: 2024, Номер 56, С. 102054 - 102054

Опубликована: Ноя. 5, 2024

Язык: Английский

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Analysis of Runoff Variation Characteristics and Influencing Factors in the Typical Watershed of Miyun Reservoir, China

Water, Год журнала: 2025, Номер 17(3), С. 442 - 442

Опубликована: Фев. 5, 2025

As an important drinking water source for Beijing, the capital of China, inflow Miyun Reservoir has been decreasing year by year, which affected urban supply security. To understand variation trend and analyze main factors influencing runoff change, this research focused on watershed as target. Based data from 1984 to 2020 at outlet basin, well precipitation, potential evaporation intensity, NDVI (normalized difference vegetation index), population, GDP (Gross Domestic Product) data, combined with correlation analysis methods, empirical statistical SCRCQ (Slope Change Ratio Cumulative Quantity) method, GIS, interannual characteristics various elements in basin were analyzed, between other was studied, degrees surface human activities, change quantitatively separated. The results showed that exhibited a distinct trend, there two mutation points 2020, 1995 2014, respectively. divided into three stages: 1984–1995 (upward T1), 1995–2014 (downward T2), 2014–2020 (stable T3). Runoff significantly correlated four indicators: summer leaf area index Chaohe River Baihe River, regional among largest. Compared period T1, contribution rates climate reduction T2 T3 6.38% 5.73%, activities 93.62% 94.27%, Therefore, annual is mainly attenuation weak. This study significant maintenance enhancement typical watershed.

Язык: Английский

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Exploring the Hydrochemical Characteristics and Controlling Processes of Groundwater in Agricultural Lower Reaches of a Typical Arid Watershed on Tibetan Plateau

Sustainability, Год журнала: 2025, Номер 17(5), С. 2117 - 2117

Опубликована: Фев. 28, 2025

Groundwater is crucial for domestic, agricultural, and ecological uses, particularly in the lower reaches of arid basins, where its quality often limits availability. A total 26 phreatic groundwater samples were collected from a typical endorheic watershed on Tibetan Plateau to assess hydrochemical characteristics inland watersheds. The characteristics, quality, formation mechanisms analyzed using Entropy-Weight Water Quality Index (EWQI), irrigation water indexes (such as sodium adsorption ratio, soluble percentage, permeability index), diagrams, correlation analysis. findings indicate that slightly alkaline, with substantial TDS variation 252.58 1810.41 mg/L. predominantly characterized by fresh facies HCO3-Ca HCO3-Na types, few saline Cl-Na types present. concentrations NO3−, NO2− NH4+, range 0.32 100.00 mg/L, 0.00 0.48 0.20 respectively, 3.59%, 26.92%, 7.69% exceeding permissible drinking recommended Chinese guideline World Health Organization. classified at 80.8% sampling sites brackish 19.2%. Approximately 96.2% sampled groundwaters rated excellent medium according EWQI assessments, suitable domestic use, while 3.8% extremely poor should be avoided direct consumption. all agricultural does not pose hazards soil. Most are long-term terms hazards, only 7.7% falling into “Permissible Doubtful” “Doubtful Unsuitable” categories, respectively. Salinity poses primary threat irrigation, 38.5%, 53.8%, exhibiting moderate, high, very high salinity risks, chemistry primarily governed water-rock interaction evaporation, additional impacts inputs nitrogen contaminants chemicals. Agricultural practices contribute elevated study area, natural evaporation drives accumulation parts. In managing utilizing resources area similar regions globally, attention paid caused activities well pollution farming.

Язык: Английский

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Hydrogeochemical heterogeneity, driving forces, and human health risk of groundwater in an arid alluvial fan plain on Tibetan Plateau

Human and Ecological Risk Assessment An International Journal, Год журнала: 2025, Номер unknown, С. 1 - 22

Опубликована: Март 18, 2025

Язык: Английский

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Urban Underground Space Geological Suitability—A Theoretical Framework, Index System, and Evaluation Method

Applied Sciences, Год журнала: 2025, Номер 15(8), С. 4326 - 4326

Опубликована: Апрель 14, 2025

With rapid urbanization, urban underground space (UUS) development has become crucial for sustainable growth. This paper systematically reviews geological suitability evaluation (GSE) methods UUS, integrating theoretical frameworks, indicator systems, and assessment techniques. We establish a comprehensive framework based on environmental strategic (ESA) principles, analyzing key factors, including rock/soil properties, hydrogeological conditions, hazards, existing structures. The study compares weighting (AHP, EWM, CRITIC) models (FCE, TOPSIS, BNM), highlighting their advantages application scenarios. A case of Xiong’an New Area demonstrates how multi-layer UUS planning integrates constraints with goals. results show that combining 3D modeling hybrid significantly improves decision-making accuracy. review provides practical guidance optimizing utilization while addressing current challenges in selection, weight rationalization, heterogeneity management.

Язык: Английский

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Feasibility Research on Surface Water Reinjection into the Sandstone Geothermal Reservoir of the Guantao Formation in Tianjin Based on Laboratory Experiments

Water, Год журнала: 2024, Номер 16(17), С. 2475 - 2475

Опубликована: Авг. 30, 2024

Tianjin possesses abundant geothermal resources, and reinjection is an effective strategy for maintaining the sustainable development utilization of these resources. However, several issues have arisen in sandstone reservoirs area, including a mismatch between capacity effluent capacity, as well challenges related to continuous reinjection. Therefore, it crucial investigate exogenous water into pore-type reservoirs. This study focuses on reservoir Guantao Formation Binhai New Area. The surface treatment process was determined through simulation experiments. Additionally, experiments examining interaction reinjected rock were conducted assess feasibility using treated hydrogeochemical response mechanisms impact under conditions also investigated. results indicate that nanofiltration module tubular microfiltration membrane are essential ensure stability system. pH TDS samples decreased after reinjecting mixed (HHS) reservoir. hydrochemical type consistently remained Cl-Na. conventional chemistry components trace elements influenced by corresponding water–rock reactions. minerals exhibited minimal precipitation, primarily consisting K-feldspar Fe-dolomite. produced during experiment accounted only 0.08% total cuttings’ mass, indicating negligible structure. PHREEQC employed simulate changes mineral saturation index before water, respectively. Notably, similar observed fluids. Thus, this demonstrates from perspective. research provides valuable insights external projects hot spring health care units, contributing effectively achievement carbon peaking neutrality goals.

Язык: Английский

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Accumulation, Source Apportionment, and Ecological-Health Risks Assessment of Topsoil Heavy Metals in Agricultural and Pastoral Areas in the Eastern Qaidam Basin, China

Water, Год журнала: 2024, Номер 16(24), С. 3719 - 3719

Опубликована: Дек. 23, 2024

The contamination of heavy metals (HMs) in the topsoil agricultural and pastoral areas threatens yield quality agriculture animal husbandry also endangers regional ecological security human health. This study analyzed HMs (Cd, Pb, As, Cu, Zn, Hg, Mn) with intensive activities to identify their accumulation, source apportionment, ecological-health risks using geochemical methods coupled positive matrix factorization (PMF). It was uncovered that concentrations presented varying scales enrichment levels topsoil. However, except for only one sample, residual fell within associated risk screening values (the RSVs). combined assessment geo-accumulation index (Igeo) factor (EF) pointed Hg Cd were primary contaminants. PMF identified four sources including natural geogenic, industry mining, composite (caused by multi-anthropogenic activities), accounting 33.7%, 41.0%, 7.7%, 17.6% contribution rates, respectively. potential largely attributed accumulation followed Cd. non-carcinogenic both groups beneath acceptable threshold, prospective carcinogenic health threats posed Cd, Pb different should not be ignored, particularly concerning children. is great significance control pollution restore soil cleanliness area.

Язык: Английский

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Hydrogeochemical Characteristics and Health Risk Assessment of Groundwater in Grassland Watersheds of Cold and Arid Regions in Xilinhot, China

Water, Год журнала: 2024, Номер 16(17), С. 2488 - 2488

Опубликована: Сен. 2, 2024

Xilinhot City is a significant pastoral city in China where groundwater serves as the primary water source for cold and arid regions. The formation evolution of material components groundwater, well quality, are directly linked to health residents. This study based on physical chemical test results 22 samples collected from River Basin Inner Mongolia. Various statistical analyses, including Piper Chadha diagrams, hydrogeochemical simulation methods, were employed assess characteristics composition sources evaluate quality non-carcinogenic risks, comprehensively discuss impact macro- microelements human health. findings indicate that igneous rocks containing minerals such potassium feldspar, plagioclase, pyroxene contribute Na+, Cl−, K+ while sedimentary like dolomite calcite supply ions Ca2+, Mg2+, HCO3−. primarily classified Class II–V, with F− NO3− exhibiting varying hazard quotients children adults area, though they do not pose risk. Additionally, enrichment hardness, SO42−, other indicators localized areas exceeds recommended values drinking water, potentially impacting digestive urinary systems body. There risk excessive fluoride F levels exceed 1 mg/L. Furthermore, content beneficial micronutrients selenium (Se), zinc (Zn), boron (B), germanium (Ge) relatively low. Based elemental abundance comparative analysis properties across five regions China, this comparison facilitates discussion definition healthy particularly relation safe consumption aims highlight issues associated serve valuable reference efforts aimed at reducing incidence endemic diseases enhancing lifespan.

Язык: Английский

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