The distribution of deuterium and 18O in dry soils 2. Experimental

Allison, G.B.; Barnes, Christopher J.; Hughes, M.W.

doi:10.1016/0022-1694(83)90078-1

Cited by 241 publications

(137 citation statements)

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“…Precipitation is the main water source for revegetated desert ecosystems, and its isotope composition varies significantly during the growing season indicating that monsoon rain water yields different isotope signals to the study area [16]. The lower slope and intercept of the GMWL suggest the occurrence of substantial soil evaporation enrichments relative to rainwater [30]; these parameters also show a close correlation between xylem water supplies of C. korshinskii and A. ordosica. Mean δ…”

Section: Discussionmentioning

confidence: 91%

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Stable Isotopic Analysis on Water Utilization of Two Xerophytic Shrubs in a Revegetated Desert Area: Tengger Desert, China

Huang¹,

Zhang²

2015

Water

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Stable isotope studies on stable isotope ratios of hydrogen and oxygen in water within plants provide new information on water sources and water use patterns under natural conditions. In this study, the sources of water uptake for two typical xerophytic shrubs, Caragana korshinskii and Artemisia ordosica, were determined at four different-aged revegetated sites (1956, 1964, 1981, and 1987) in the Tengger Desert, a revegetated desert area in China. Samples from precipitation, soil water at different soil layers, and xylem water from each species were collected in 2013. The proportion of plant water sources derived from different potential sources was determined using oxygen (δ 18 O) and hydrogen (δD) stable isotope analysis combined with a multiple-source linear mixing model. Results showed that the local meteoric water line (LMWL) at Shapotou was as follows: δD = 7.39δ 18O values varied with depth, and the variation decreased as the age of the revegetated site increased. In general, C. korshinskii and A. ordosica mainly tapped water from the upper soil layer (10-100 cm) during the wet seasons. With increasing sand stabilization age, the proportion of water sources from shallow soil water decreased, whereas deep soil moisture utilization increased. During the dry season, C. korshinskii and A. ordosica showed evident hierarchical utilization of soil water in different soil layers. Small rainfall events did not significantly affect the water source of C. korshinskii and A. ordosica. OPEN ACCESSWater 2015, 7 1031However, large rainfall events not only complemented the deep soil moisture, but also recharged the shallow soil water after a few days, and the proportion of soil water source from deep soil layer increased from 2% ± 0.7% to 10% ± 1.4% for both plants.

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Section: Discussionmentioning

confidence: 91%

“…O and δD values decreased with depth, especially in older revegetated sites (1956a and 1964a), mainly because precipitation recharged soil water and isotopically enriched surface layers by evaporative water loss; afterward, soil water depleted with depth in the soil profile [14,30].…”

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Stable Isotopic Analysis on Water Utilization of Two Xerophytic Shrubs in a Revegetated Desert Area: Tengger Desert, China

Huang¹,

Zhang²

2015

Water

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“…Note that evaporation may occur either during infiltration Allison et al, 1983;DePaolo et al, 2004) or after spring discharge. The extent of pre-recharge vs. post-discharge evaporation is unknown for the perched spring dataset that was used in the current study.…”

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Geochemical and Isotopic Evaluation of Groundwater Movement in Corrective Action Unit 97: Yucca Flat/Climax Mine, Nevada Test Site, Nevada, Rev. No.: 0

Farnham¹

2006

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“…However, most samples were collected directly from the discharge point, which typically consisted of a pipe driven horizontally into the ground. Under these circumstances, enriched isotopic values are more suggestive of evaporation during recharge, or evaporative loss of shallow groundwater through the vadose zone Allison et al, 1983). …”

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Environmental isotope investigation of groundwater flow in the Honey Lake Basin, California and Nevada

Rose¹,

Davisson²,

Hudson³

et al. 1997

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DISCLAIMERThis document waa prepared aaan account of work aponaoredby an agency oftha United StataeGovernment. Neither the United States Govemmmt nor the University dCatifomia nor any oftbeir employeeajmakea any wammty, express or bnpiied, or assumes any legal liability or reapodbiiity for the accuracy, completenõ r uaefulnem of any information, apparatus produ~or procasadwloa@ or repreaentathat itaueewould not infringe privately owned rights. Reference herein to any apeeif&commerdal productvjproc~or service by trade name trademark, manufacturer, or otherw@ doeanot necaswi iy COldtUteOf imply k? endoraemen b recommmdatkq or favoring by the United StatesGovernment ortbeUnkraity ofCalifomia. Theviews and opinions of authora mpreaaed herein do not necessarily state or reflect thoee of the United StatesGovernment or theUniversity ofCaiiiomi~and ahatl not be used for advertising or product endorsement purpoaea.Thii report baa been reproduced directly from the best available copy. . Isotopic and chemical data are consistent with groundwater discharge within an evapotranspiration zone along the central axis of the basin. Evidence inclu&s: (1) relatively old 14Cages at shallow depths; (2) moderately evaporated 51*0-5D signatures in shallow groundwaters from this arew and (3) correspondingly high electrical conductivities in the evaporated groundwaters. considerably less than the estimate of 130,000 ac-ft yr-l given by Handman et al. (1990). It should be emphasized that recharge is not uniform across the basin. The highest recharge rates occur in the western part of the basin, where precipitation rates are the greatest.Estimated recharge rates along the base of the Sierra Nevada range are on the order of 17,000 to 23,000 ac-ft yr-l." The effect of intensive groundwater pumping in the eastern half of the basin would be equivalent to groundwater "mining" since the majority of the groundwater in this region has old 14Cages. Moreover, prolonged pumping would be expected to induce the migration of contaminants that currently reside in shallow groundwater within the boundaries of the Sierra Army Depot. {2 IntroductionHoney Lake Basin is a 5700 km2 closed alluvial basin located in the semi-arid high desert -100 km northwest of Reno, Nevada. The proposed development of production wells to augment the municipal water supply for Reno provided the impetus for several recent studies aimed at understanding the hydrogeology and availability of water resources in the basin (e.g. Handman et al., 199~Rockwell, 199Q Bohm, 199Q Stone et al., 1990).Two central issues must be addressed with regard to water resource development in this region. First, the rate at which the aquifer is recharged must be evaluated in order to determine how much groundwater withdrawal the basin can sustain before serious overdmfting occurs. Second, there is a question as to whether intensive groundwater pumping will induce the migration of contaminants residing in shallow groundwaters beneath the Sierra Army Depot, on the eastern side of Honey Lake (see Figure 1)...

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The distribution of deuterium and 18O in dry soils 2. Experimental

Cited by 241 publications

References 10 publications

Stable Isotopic Analysis on Water Utilization of Two Xerophytic Shrubs in a Revegetated Desert Area: Tengger Desert, China

Stable Isotopic Analysis on Water Utilization of Two Xerophytic Shrubs in a Revegetated Desert Area: Tengger Desert, China

Geochemical and Isotopic Evaluation of Groundwater Movement in Corrective Action Unit 97: Yucca Flat/Climax Mine, Nevada Test Site, Nevada, Rev. No.: 0

Environmental isotope investigation of groundwater flow in the Honey Lake Basin, California and Nevada

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