The Wajid aquifer is considered the main source of water for drinking and irrigation in Wadi Al-Dawasir Najran, southern region Saudi Arabia. This has been used since 1960s, due to expansion agricultural activities, overexploited. study aims understand origin, hydrochemical processes groundwater shallow unconfined, deep confined parts area. In-situ parameters (pH, temperature, EC, TDS) were mea...

This study evaluated the freshwater use of two mangrove species (R. mucronate: Rhizophora mucronata and A. marina: Avicennia marina) growing in a coastal area Djibouti City on Moucha Island Djibouti. We accomplished this by comparing hydrogen oxygen stable isotope ratios (δ2H δ18O) body water with those creek water, soil groundwater, rainwater samples. Line-conditioned excess (lc-excess) was ca...

This work aims to utilize oxygen and hydrogen stable isotopes as tracers for determining the groundwater sources of recharge in central Nile delta. The analyzed water samples were collected from canals drains surface water, soil shallow, intermediate deep zones groundwater. isotopic data indicated that have higher content than recent river (? 18O = 2.39‰ ?2H 22‰) which reflect influence an evap...

Increasing trends of groundwater and soil salinization, as well desertification, is characteristic many arid semi-arid regions under climatic anthropogenic influences. This has led to the implementation management strategies protect ecological environment. Changling County in Northeast China a typical area that experienced these changes. Thus, such “Three North Shelterbelt Project” which involv...

The overall geochemical composition of natural-water regimes reflects the response to long-term interactions between water and surrounding environment in process its circulation. Their characteristics can reflect both aquatic ecological health tracer source, as well budget. In this study, Hulun Lake, a remote lake cold arid area China, was chosen order analyze characteristics, including major i...

Groundwater is the foremost water resource for various purposes in arid regions. The extremely climate makes groundwater geochemistry there evolve faster a short distance and supply face higher pressure of poor geochemical quality. A hyper-arid watershed on Tibetan Plateau was investigated to get insights into signature, formation, quality suitability there. total 13 surface samples 32 phreatic...

The current study focuses on the Wadi Qanunah basin, which is considered one of Makkah Al-Mukarramah’s most important watersheds. It located in southwestern part Al Qunfudhah governorate. identification and characterization recharging sources for quaternary aquifer goals this study. In context, different methods will be applied factors impacting groundwater. Such based integration geographic in...

The extent to which leaf water D-enrichment (transpiration) and soil water D-enrichment (evaporation) affect the D/H ratio of plant leaf waxes remains a contentious issue, with important implications for paleohydrologic reconstructions. In this study we measure dD values of precipitation (dDp), groundwater (dDgw), plant xylem water (dDxw) and leaf water (dDlw) to understand their impact on the ...

Reservoir management decisions are commonly made using surface water models with simplified and/or abstracted physical processes and limited groundwater-surface water interactions. Optimizations with such models might not capture the potential importance of and feedbacks from physical processes such as evaporation and infiltration. This study details how management algorithms of the Water Evalu...