Transformation between Surface Water and Groundwater under the Influence Development of Agriculture in Arid Region of Northwest China

2012 ◽  
Author(s):  
Jian-min Ren ◽  
Xin-Min Ran ◽  
Yang Yang ◽  
Zhao-Quan Yu
Keyword(s):  
Surface Water ◽  
Arid Region ◽  
Northwest China ◽  
Surface Water And Groundwater

Hydrochemical and isotopic interpretation of interactions between surface water and groundwater in Delingha, Northwest China

2021 ◽  
Vol 598 ◽  
pp. 126243
Author(s):  
Nuan Yang ◽  
Pengpeng Zhou ◽  
Guangcai Wang ◽  
Biao Zhang ◽  
Zheming Shi ◽  
...  
Keyword(s):  
Surface Water ◽  
Northwest China ◽  
Surface Water And Groundwater

scholarly journals Groundwater recharge in the oasis-desert areas of northern Tarim Basin, Northwest China

2020 ◽  
Vol 51 (6) ◽  
pp. 1506-1520
Author(s):  
Weihua Wang ◽  
Yaning Chen ◽  
Wanrui Wang
Keyword(s):  
Stable Isotopes ◽  
Surface Water ◽  
Groundwater Recharge ◽  
Tarim Basin ◽  
Shallow Groundwater ◽  
Northwest China ◽  
Water Infiltration ◽  
Ecological Processes ◽  
Surface Water And Groundwater ◽  
Northern Tarim Basin

Abstract Groundwater is an important source for maintaining desert ecological processes in arid areas. With the increasing intensity of climate change and human activities, the rivers in Tarim Basin are severely dried-up. Aiming at the dried-up river, vegetation degradation and oasis maintenance in the middle and lower reaches of dried-up river basin, groundwater recharge and groundwater-surface water interaction have become hotspots, but are not well known. We examined spatial distributions and controlling factors of groundwater stable isotopes and recharge at oasis scale using data from 247 samples surveyed in the four headwaters in the northern Tarim Basin. Stable isotopes of surface water and groundwater were different from each other, and varied among sampling sites. Surface water and groundwater isotopes generally became enriched towards the east throughout the study area, while surface water isotopes showed enrichment towards the upstream direction within each catchment, mainly due to cultivated area expansion. Surface water mainly originated from precipitation, groundwater, and meltwater, while shallow groundwater derived from lateral groundwater flow, river and irrigated water infiltration, and little precipitation. The mainstream water was directly recharged by the headwaters. The results could provide a new insight into groundwater cycling in oases of dried-up river basins, which is helpful for regional groundwater management.

scholarly journals Vegetation Change and Its Response to Climate Extremes in the Arid Region of Northwest China

2021 ◽  
Vol 13 (7) ◽  
pp. 1230
Author(s):  
Simeng Wang ◽  
Qihang Liu ◽  
Chang Huang
Keyword(s):  
Arid Region ◽  
Vegetation Change ◽  
Vegetation Index ◽  
Pearson Correlation ◽  
Time Lag ◽  
Climate Extremes ◽  
Northwest China ◽  
Precipitation Extremes ◽  
Temperature Extremes ◽  
Increasing Trend

Changes in climate extremes have a profound impact on vegetation growth. In this study, we employed the Moderate Resolution Imaging Spectroradiometer (MODIS) and a recently published climate extremes dataset (HadEX3) to study the temporal and spatial evolution of vegetation cover, and its responses to climate extremes in the arid region of northwest China (ARNC). Mann-Kendall test, Anomaly analysis, Pearson correlation analysis, Time lag cross-correlation method, and Least absolute shrinkage and selection operator logistic regression (Lasso) were conducted to quantitatively analyze the response characteristics between Normalized Difference Vegetation Index (NDVI) and climate extremes from 2000 to 2018. The results showed that: (1) The vegetation in the ARNC had a fluctuating upward trend, with vegetation significantly increasing in Xinjiang Tianshan, Altai Mountain, and Tarim Basin, and decreasing in the central inland desert. (2) Temperature extremes showed an increasing trend, with extremely high-temperature events increasing and extremely low-temperature events decreasing. Precipitation extremes events also exhibited a slightly increasing trend. (3) NDVI was overall positively correlated with the climate extremes indices (CEIs), although both positive and negative correlations spatially coexisted. (4) The responses of NDVI and climate extremes showed time lag effects and spatial differences in the growing period. (5) Precipitation extremes were closely related to NDVI than temperature extremes according to Lasso modeling results. This study provides a reference for understanding vegetation variations and their response to climate extremes in arid regions.

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