Preliminary research on hydrogen and oxygen stable isotope characteristics of different water bodies in the Qilian Mountains, northwestern Tibetan Plateau

The test of the ecohydrological separation hypothesis in a dry zone of the northeastern Tibetan Plateau

“…All samples had repeats in order to calculate their average values. Similar procedures of sample collection were previously applied in this region in July and August 2015 (Qiu, Zhang, & Wang, 2016).…”

“…Similar procedures of sample collection were previously applied in this region in July and August 2015(Qiu, Zhang, & Wang, 2016). The event-based precipitation samples were collected at 10 meteorological stations (i.e., Subei, Sunan, Minle, Gulang, Tuole, Yeniugou, Qilian, Menyuan, Tianzhu, and Wushaoling) from August 2015 to August 2017 by the local meteorological bureaus.…”

Comment on “Origin of water in the Badain Jaran Desert, China: new insight from isotopes” by Wu et al. (2017)

“…Wu et al (2017) noted the difference in the d-excess value between the Qilian-sourced water (sampled from the northern slope rivers of the Qilian Mountains region) and BJD groundwater, and argued that the Qilian Mountains cannot be the origin of the latter because no evaporation could occur to water underground. Located in the northeastern margin of the Qinghai-Tibet Plateau, the Qilian Mountains area consists of many northwest-southeast parallel mountain ranges and valleys (Qiu et al, 2016). Although little evidence of evaporation was found in sampled river water from the northern slope area, water in other near-surface water systems (like lakes, wetlands, and soil water reservoirs) of longer residence time within the wide Qilian Mountains region would have been subjected to more intense evaporation and produced isotopic signatures similar to that of the BJD groundwater.…”

Determination of stable isotope characteristics and natural radioactivity in drinking waters in Sandıklı basin (Afyonkarahisar-Turkey)

“…8 Sub-modern (recharged prior to 1952) 0. Mixture of sub-modern and modern [5][6][7][8][9][10][11][12][13][14][15] Modern (<5-10 years) [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] Some bomb tritium present >30…”

“…On the other hand, in water cycle studies the stable isotopes of hydrogen (δ 2 H) and oxygen (δ 18 O) in H2O have long been used as naturally occurring tracers to asses rainfall importance, to track the source and flux of water to and from rivers and lakes in watersheds, and to evaluate the origin and age of groundwater resources [4], [5]. Many researches focus on the assessment of isotopic geochemistry in natural water resources [6]- [14]. Also, many studies were performed on natural radioactivity (gross alpha and gross beta) in groundwater [15]- [21].…”