Statistical study to identify the key factors governing ground water recharge in the watersheds of the arid Central Asia

Zhu, Bowen; Wang, Yueling

doi:10.1007/s10661-015-5075-4

Cited by 12 publications

(5 citation statements)

References 61 publications

(73 reference statements)

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“…In addition, we apply hierarchical cluster analysis of the data to group samples based on multi-elements analysis (Zhu et al, 2017). Hierarchical cluster analysis, based on Ward's method (Ward, 1963) and the Euclidean distance, was conducted to classify samples using trace elements as the variables (Wolff and Parsons, 1983;Zhu and Wang, 2016). Trace elements (Ba, Bi, Ce, Co, Cr, Cs, Ga, La, Mn, Rb, Sr, V and Zr) and Ti whose average abundance were larger than 20 ppm were selected for hierarchical cluster analysis in order to avoid errors caused by the detection limit of analytical instrument.…”

Section: Methods and Analytical Datamentioning

confidence: 99%

Physiochemical Characteristics, Provenance, and Dynamics of Sand Dunes in the Arid Hexi Corridor

2021

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Dynamic changes of aeolian landforms under changing environments in a middle-latitude desert belt is a typical problem of climate change and related landscape response. It need a comprehensive understanding of the formation mechanisms of dune landforms with the supply of material suitable for aeolian transport and favorable conditions of sediment availability and wind regimes in the region. Based on comprehensive evidences from geomorphological, sedimentological, geochemical, and hydrological analysis, this study discussed the dynamical changes of different dune landforms during the past half century and their provenance in the Hexi Corridor, China. The results show that there are two states of sand dunes movement in the Hexi Corridor in the past half century, dynamic migration and basically stable. The crescent-shaped dunes move the fastest, followed by the chains of barchan dunes. Only the top of the pyramid dunes wigwags, while the parabolic dunes and the longitudinal dunes hardly move forward. The moving speed of sand dunes is positively correlated with the wind speed ≥5 m/s at a yearly scale. The grain size of sand dunes in the western Hexi Corridor is coarser than that in the central-eastern part, and also larger than those in other deserts of northern China and of the world. Different motion modes of saltation, suspension, and creeping are identified between aeolian, alluvial/fluvial and gobi sediments. Dune sands are mainly “sediments of in-situ rising” that originated from alluvial/fluvial/lacustrine deposits of ancient rivers, lakes, and aeolian deposits in the erosion zone of the forelands of the Qilian and Beishan Mountains and the north-neighboring deserts. This reveals a significance interaction between wind and water dynamics in the formation and evolution of aeolian landforms in the arid study area. Sufficient transport capacity is evidenced for both the western and eastern parts of the Hexi Corridor, sufficient sand supply and sand availability, however, is the favorable factor for dune formation in the east part but is the limiting factor for the west.

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Section: Methods and Analytical Datamentioning

confidence: 99%

Physiochemical Characteristics, Provenance, and Dynamics of Sand Dunes in the Arid Hexi Corridor

2021

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“…Previous studies in other locations have demonstrated that factor analysis (FA) and PCA could be used for differentiation of natural and anthropogenic processes affecting groundwater chemistry (Cloutier et al 2008;Dragon and Gorski 2015;Zhu and Wang 2016;Zhu et al 2017). Anthropogenic processes such as groundwater pumping, irrigation return flow and the use of fertilizers may be influencing the groundwater composition in the study area.…”

Section: Anthropogenic Processesmentioning

confidence: 97%

“…Therefore, the hydrogeochemical evolution of groundwater in the Manas River Basin is complex due to the mutual influence of anthropogenic and natural processes. Previous studies in other locations have demonstrated that factor analysis (FA) and PCA could be used for differentiation of natural and anthropogenic processes affecting groundwater chemistry (Cloutier et al 2008;Dragon and Gorski 2015;Zhu and Wang 2016;Zhu et al 2017). Figure 5 shows the PCA scores for the first three components and the corresponding distribution of four clusters.…”

Section: Anthropogenic Processesmentioning

confidence: 99%

Hydrogeochemical Evolution Along Groundwater Flow Paths in the Manas River Basin, Northwest China

et al. 2018

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The impacts of long‐term pumping on groundwater chemistry remain unclear in the Manas River Basin, Northwest China. In this study, major ions within five surface water and 105 groundwater samples were analyzed to identify hydrogeochemical processes affecting groundwater composition and evolution along the regional‐scale groundwater flow paths using the multivariate techniques of hierarchical cluster analysis (HCA) and principal components analysis (PCA) and traditional graphical methods for analyzing groundwater geochemistry. HCA classified the groundwater samples into four clusters (C1 to C4). PCA reduced the dimensionality of geochemical data into three PCs, which explained 86% of the total variance. The results of HCA and PCA were used to identify three zones: “recharge,” “transition,” and “discharge.” In the recharge zone the groundwater type is Ca‐HCO3‐SO4 and is primarily impacted by the dissolution of calcite and silicate weathering. In the transition zone the groundwater type is Ca‐HCO3‐SO4‐Cl and is impacted by rock dissolution and reverse ion exchange. In the discharge zone the groundwater type is Na‐Cl and is impacted by evaporation and reverse ion exchange. In addition, anthropogenic activities impact the groundwater chemistry in the study area. The groundwater type generally changes from Ca‐HCO3‐SO4 in the recharge area to Na‐Cl in the discharge area along the regional‐scale groundwater flow paths. This study provides a process‐based knowledge for understanding the interaction of groundwater flow patterns and geochemical evolution within the Manas River Basin.

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“…The use of N fertilizers in particular is well established throughout the world and increased use has led to extremely high NO 3 concentrations in groundwaters [47] [48] [49]. Compared with the NO 3 contents (0.5~7.7 mg/L) in the studied surface waters, groundwater samples (such as samples 16,25,26) collected from different irrigated oases in the Jungar watershed have evidently higher concentrations of NO 3 -(22-37 mg/L), indicating the strong influence of local agricultural practices in these zones.…”

Section: Irrigation Watermentioning

confidence: 99%

Natural Water Quality and Its Suitability in the Northern Tianshan Catchments (Central Asia)

Zhu¹

2018

HYD

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The use of water resources in arid lands is strongly limited by their quantity. To add to such knowledge, this study evaluates the natural water quality and its suitability for drinking, agricultural and industrial purposes in the northern Tianshan catchments (Central Asia), using chemical-physical indicators. The waters are neutral to alkaline and most of them are soft-fresh waters. The total dissolved solid (TDS) varies over two orders of magnitude. Much of the solutes and physicochemical parameters in water are under the highest desirable limits of the World Health Organization (WHO) for drinking purpose and most waters are of good water quality for irrigation. The effects of local pollution are minimal in the montane and piedmont areas of these watersheds but are significant in the oases and central areas of the drainage basins. Although the headwaters of the northern Tianshan catchments represent natural background conditions (soft-fresh water in salinity and hardness) and population densities within the catchment are relatively low, the river basin is facing relatively high anthropogenic pressure on water quality in the low reaches. The main contributors to the nutrient emissions are agricultural land use and, to a lesser extent, unban settlements with a high proportion of households without connection to wastewater treatment plants. Proposals for regional water resources management are advised, i.g. the geographic data and information should be detailedly included in the assessment and monitoring procedure, a water quality model should be built, and information technology such as visualization technology and the internet should be used.

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Statistical study to identify the key factors governing ground water recharge in the watersheds of the arid Central Asia

Cited by 12 publications

References 61 publications

Physiochemical Characteristics, Provenance, and Dynamics of Sand Dunes in the Arid Hexi Corridor

Physiochemical Characteristics, Provenance, and Dynamics of Sand Dunes in the Arid Hexi Corridor

Hydrogeochemical Evolution Along Groundwater Flow Paths in the Manas River Basin, Northwest China

Natural Water Quality and Its Suitability in the Northern Tianshan Catchments (Central Asia)

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