Subjects: Geosciences >> Geography submitted time 2024-03-01 Cooperative journals: 《干旱区研究》
Abstract： Arsenic (As) and fluoride (F) pollution in water bodies, along with their coexistence, are criticalenvironmental concerns, with long-term exposure posing a significant threat to public health. This study focuseson the Manas River Basin as the research area, analyzing the hydrochemical, and spatial distributioncharacteristics of groundwater with high As and F content. Furthermore, the study aims to elucidate thehydrogeochemical processes related to the origin, migration, and enrichment of As, and F in groundwater,considering geological conditions, occurrence environments, and the influence of human activities. The resultsshow that the groundwater in the study area exhibits an alkaline-reducing environment. The mass concentrationsof As and F in groundwater range from 1.13 to 41.35 μg ·L − 1 and from 0.06 to 8.02 mg ·L − 1, respectively.Groundwater samples with high As and F content constituted 62.9% and 45.7% of the total samples, respectively,while samples with a coenrichment of As and F accounted for 37.1% of the total samples. As- F coenrichedgroundwater is mainly distributed in the northern plain region, near the edge of the desert, with the dominanthydrochemical types being HCO3 ·Cl and HCO3 ·SO4 ·Cl. The primary sources of As and F in groundwater arehigh-content rock strata found in the southern mountainous area of the Manas River Basin. The high pH value,low SO2−4 /Cl− molar ratio, and low Eh of the high-As-content groundwater in the Manas River Basin indicate thata weak alkaline- reducing environment facilitates As enrichment in groundwater. Conversely, groundwater withhigh F content is characterized by high pH, HCO−3 , and Na+ levels, as well as low Ca2+, indicating that an alkalineenvironment with high Na+ and low Ca2+ content favors F enrichment in groundwater.
Subjects: Geosciences >> Geography submitted time 2023-12-16 Cooperative journals: 《干旱区研究》
Abstract： The Bortala River Basin in Xinjiang is short of water resources and is unevenly distributed in time and space. It is important to quantitatively calculate the conversion rates of the surface water and groundwater in different reaches of the basin and as well as at different periods for the purposes of groundwater exploitation and replenishment and for the optimal allocation of water resources. Based on the daily flow measurement data from five monitored sections in the middle reaches of Bortala River from December 1, 2021, to November 30, 2022, Using river runoff analysis method, combined with the P-III distribution frequency curve, comparisons of water quantity between different monitoring sections, and hydrogeological cross-sections. The relationship between the infiltration rate and the runoff in the leaking river section was also fitted. The results showed that: (1) among the five monitoring stations, Bole Hydrology Station had the largest annual runoff, while Chaxiang Bridge had the smallest; (2) the runoff in the middle reaches of Bortala River was in a normal flow year year of 2022. (3) in the upper part of the middle reaches of the Bortala River, groundwater is converted to recharge surface water; The surface water in the section that runs from the Kundelun canal head to Chaxiang Bridge has a large amount of infiltration to recharge groundwater (infiltration coefficient: 0.67), and the infiltration rate was found to be significantly negatively correlated with the quantity of incoming water; In the lower part, groundwater spilled over the surface. The middle reaches of the Bortala River experienced three conversions of surface water and groundwater, with an overall performance of groundwater overflow supplementing surface water.
Subjects: Geosciences >> Geography submitted time 2022-03-28 Cooperative journals: 《干旱区研究》
Abstract：为研究吐鲁番盆地平原区地下水水化学特征及水质状况，根据吐鲁番地区2015年（最近1次）全面的地下水污染调查数据，选取44组地下水水质检测数据（潜水33组，承压水11组），运用数理统计、Piper三线图、Gibbs图、离子比值法对研究区地下水水化学特征及成因进行分析，运用内梅罗指数法、改进内梅罗指数法和模糊综合评价法对研究区地下水质量进行评价。结果表明：（1）吐鲁番盆地平原区地下水主要为低矿化度的弱碱性水，水化学类型以SO4Cl-NaCa型和HCO3SO4-NaCa型为主，其次为HCO3SO4Cl-NaCa型；研究区水化学成分主要受蒸发浓缩和岩石风化共同作用的影响。（2）地下水中的Ca2+、Mg2+主要来自蒸发岩的溶解，Na+、K+、Cl-主要来自岩盐的溶解，少量潜水中的Na+和K+来自硅酸盐的溶解。（3）(Na+-Cl-)/［(Ca2++Mg2+)-(SO42-+HCO3-)=-1，呈显著负相关，说明地下水化学组分的形成受到了阳离子交换作用的影响。（4）水质评价结果显示：3种评价方法中的Ⅲ类及以上水质占比均高于55%，地下水质量整体较好；模糊综合评价法的Ⅳ、Ⅴ类水占比最低为27.3%，Ⅳ、Ⅴ类水主要分布在托克逊县的博斯坦乡和鄯善县以东的火车站镇和七克台镇。
Subjects: Environmental Sciences, Resource Sciences >> Other Disciplines of Environmental Sciences, Resource Sciences submitted time 2021-03-02 Cooperative journals: 《干旱区研究》
Abstract：为研究新疆石河子市地下水化学特征及成因，采用描述性统计和Piper三线图对研究区19个潜水和25个浅层承压水水样的主要离子组分含量及水化学类型进行统计分析，并运用Schoeller图、Gibbs图和离子比值图等方法分析影响研究区地下水化学特征形成的主要因素。结果表明：石河子市浅层地下水为低矿化度的弱碱性水，水化学类型以HCO3-Ca和HCO3·SO4-Ca型为主，其次是HCO3·SO4-Na型。影响潜水水化学特征的主要是岩石风化作用和地表水蒸发浓缩后的渗透补给，影响浅层承压水水化学特征的主要因素是岩石风化作用；地下水中少量Ca2+和Mg2+来自碳酸盐的溶解，一部分Ca2+来自硫酸盐的溶解，Na+和Cl-主要来自岩盐的溶解；γ（Na+-Cl-）与γ（Ca2++Mg2+）-γ（HCO3-+SO42+）呈负相关关系，表明阳离子交换作用也是浅层地下水中化学组分形成的重要作用之一。
Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2020-06-27 Cooperative journals: 《干旱区研究》
Abstract：基于新疆喀什噶尔河流域平原区2014年74组地下水水质检测结果，运用克里格插值法、Gibbs图、离子比值法、矿物饱和指数法，揭示地下水中TDS分布特征及其成因。结果表明：研究区潜水中TDS介于354.80~6505.00 mg·L-1，平均值为1 994.36 mg·L-1，无盐水分布，总体表现为西高东低，水化学类型主要为SO4·Cl-Na·Ca·Mg、HCO3·SO4-Na·Ca·Mg和HCO3·SO4-Ca·Mg；承压水中的TDS普遍较高，介于214.00~14 548.00 mg·L-1，平均值为2 480.30 mg·L-1，其分布特征总体表现为南高北低，水化学类型以SO4·Cl-Na·Ca·Mg、HCO3·SO4-Na·Ca·Mg及SO4-Na·Ca·Mg为主。控制本区地下水TDS的主要机制为自然地理因素、岩石风化作用、蒸发浓缩作用、矿物溶解作用及人类活动。
Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2020-06-19 Cooperative journals: 《干旱区研究》
Abstract：新疆喀什噶尔河流域地下水的形成主要受到溶滤、蒸发浓缩、阳离子交换和混合等的影响。石膏、岩盐和萤石矿物发生溶解，为地下水中的SO42-、Na+、Cl-和F-提供重要来源；石膏、长石类、方解石和白云石等矿物的溶解，为地下水中的Ca2+和Mg2+提供主要来源。Gibbs图解法表明，北部克孜勒苏河地下水系统中潜水主要受岩石风化和蒸发浓缩的双重影响，承压水主要受岩石风化的影响；南部盖孜河地下水系统中潜水主要受蒸发浓缩的影响，个别浅层承压水采样点受岩石风化的影响。北部克孜勒苏河地下水系统中的阳离子交换作用强于南部盖孜河地下水系统；同时，阳离子交换作用随着含水层深度的逐渐增加而增强。地表水与地下水存在混合作用，不同含水层之间也存在着混合作用。
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