Integrating periphyton and surface water–groundwater methods to understand lake ecosystem processes

2021 ◽  
Author(s):  
Karen S. Atkins ◽  
Thomas P. Shannon ◽  
Michael F. Meyer ◽  
Isabella A. Oleksy ◽  
Nicholas T. Framsted ◽  
...  
Keyword(s):  
Surface Water ◽  
Ecosystem Processes ◽  
Lake Ecosystem

Surface-water hydrodynamics and regimes of a small mountain stream–lake ecosystem

2006 ◽  
Vol 329 (3-4) ◽  
pp. 500-513 ◽  
Author(s):  
Christopher D. Arp ◽  
Michael N. Gooseff ◽  
Michelle A. Baker ◽  
Wayne Wurtsbaugh
Keyword(s):  
Surface Water ◽  
Mountain Stream ◽  
Lake Ecosystem

scholarly journals Modelling surface water-groundwater interactions at the Palas Basin (Turkey) using FREEWAT

2017 ◽  
Vol 6 (3) ◽  
Author(s):  
Filiz Dadaser-Celik ◽  
Mete Celik
Keyword(s):  
Surface Water ◽  
Groundwater Flow ◽  
Water Levels ◽  
Central Anatolia ◽  
Lake Ecosystem ◽  
Groundwater Pumping ◽  
Groundwater Abstraction ◽  
Groundwater Levels ◽  
Water Flows ◽  
Pumping Rates

Palas Basin is a semi-arid closed basin located in the Central Anatolia region of Turkey. The major economic activity in the basin is agriculture; therefore, both surface water and groundwater are used for irrigation. However, intensive use of water resources threatens the hydrologic sustainability of a lake ecosystem (Tuzla Lake) located in the basin. In this study, we analyzed the relationships between agricultural water uses in the Palas Basin and water flows to the Tuzla Lake using groundwater flow model developed with the FREEWAT platform. The model grid with 250 m x 250 m resolution was created based on the entire watershed. Two hydrostratigraphic units were identified. The source terms defined in the model were rainfall recharge and the sink terms were evapotranspiration and wells. The model was run for one year at steady state conditions. Three scenarios were simulated to understand the effect of groundwater use on the lake hydrology. The first scenario assumed that there was no groundwater abstraction. As the second and third water management scenario, the model was run with 50% less and %50 more groundwater abstraction than that of the reference conditions. The model successfully simulated the direction of groundwater flow and groundwater levels in the basin. Annual groundwater recharge was simulated as 5.27 million m3. Groundwater losses were due to pumping (1.49 million m3/yr), leakance to Değirmen River (2.25 million m3/yr) and seepage to Tuzla Lake (1.53 million m3/yr). Water flows to Tuzla Lake were significantly related to pumping rates. Increasing groundwater pumping rates reduces groundwater flows to Tuzla Lake and lowers lake water levels. No groundwater abstraction and reduction in groundwater pumping rates increase water flows to Tuzla Lake and cause higher water levels. This analysis showed that protection of hydrologic characteristics of Tuzla Lake is only possible with more control on groundwater abstraction.

Application of a Simple Cold Stub to the Direct Observation of Frozen Hydrated Sand

1973 ◽  
Vol 31 ◽  
pp. 212-213
Author(s):  
John M. Wehrung ◽  
Richard J. Harniman
Keyword(s):  
United States ◽  
Surface Water ◽  
Direct Observation ◽  
Controlled Study ◽  
Clay Particles ◽  
Organic Debris ◽  
Rock Formations ◽  
Water Tables ◽  
Permeable Rock ◽  
Natural Means

Water tables in aquifer regions of the southwest United States are dropping off at a rate which is greater than can be replaced by natural means. It is estimated that by 1985 wells will run dry in this region unless adequate artificial recharging can be accomplished. Recharging with surface water is limited by the plugging of permeable rock formations underground by clay particles and organic debris.A controlled study was initiated in which sand grains were used as the rock formation and water with known clay concentrations as the recharge media. The plugging mechanism was investigated by direct observation in the SEM of frozen hydrated sand samples from selected depths.

AN EVALUATION OF SUB-SURFACE WATER QUALITY AROUND BHARUCH-SURAT INDUSTRIAL REGION, GUJARAT, INDIA

2019 ◽  
Vol 38 (2) ◽  
pp. 200-220
Author(s):  
SOMNATH SAHA ◽  
◽  
SUKANTA KUMAR SAHA ◽  
TATHAGATA GHOSH ◽  
ROLEE KANCHAN ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
Industrial Region
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