NDLI: Geochemical, isotopic and hydrological mass balance approaches to constrain the lake water–groundwater interaction in Dal Lake, Kashmir Valley

Content Provider	Springer Nature Link
Author	Saleem, Mohammad Jeelani, Ghulam
Copyright Year	2017
Abstract	It is important to have qualitative as well as quantitative understanding of the hydraulic exchange between lake and groundwater for effective water resource management. Dal, a famous urban fresh water lake, plays a fundamental role in social, cultural and economic dynamics of the Kashmir Valley. In this paper geochemical, isotopic and hydrological mass balance approaches are used to constrain the lake water–groundwater interaction of Dal Lake and to identify the sources of lake water. Water samples of precipitation (n = 27), lake water (n = 18) and groundwater (n = 32) were collected across the lake and its catchment for the analysis of δ$^{18}$O and δ$^{2}$H. A total of 444 lake water samples and 440 groundwater samples (springs, tube wells and dug wells) were collected for the analysis of Ca$^{2+}$, Mg$^{2+}$, HCO$_{3}$ $^{−}$, SO$_{4}$ $^{2−}$, Cl$^{−}$, NO$_{3}$ $^{−}$, Na$^{+}$ and K$^{+}$. Water table and lake water level were monitored at 40 observation locations in the catchment. Water table map including pH and EC values corroborate and verify the gaining nature of the Dal Lake. Stable isotopes of lake water in Boddal and Gagribal basins showed more deviation from the global meteoric water line than Hazratbal and Nigeen basins, indicating the evaporation of lake water. The isotopic and geochemical mass balance suggested that groundwater contributes a significant proportion (23–40%) to Dal Lake. The estimated average groundwater contribution to Dal Lake ranged from 31.2 × 10$^{3}$ to 674 × 10$^{3}$ m$^{3}$ day$^{−1}$ with an average of 276 × 10$^{3}$ m$^{3}$ day$^{−1}$. The study will be useful to delineate the possible sources of nutrients and pollutants entering the lake and for the management of lake water resources for sustainable development.
Starting Page	1
Ending Page	18
Page Count	18
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	76
Issue Number	15
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2017-08-04
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dal Lake Stable isotopes Lake water level Water table Geochemical and isotopic mass balance Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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