نتایج جستجو برای: inland coastal aquifer
تعداد نتایج: 67527 فیلتر نتایج به سال:
Groundwater in coastal areas is commonly disturbed by tidal fluctuations. A two-dimensional analytical solution is derived to describe the groundwater fluctuation in a leaky confined aquifer system near open tidal water under the assumption that the groundwater head in the confined aquifer fluctuates in response to sea tide whereas that of the overlying unconfined aquifer remains constant. The ...
We submitted tree species occurrence and geoclimatic data from 59 sites in a river basin in the Atlantic Forest of southeastern Brazil to ordination, ANOVA, and cluster analyses with the goals of investigating the causes of phytogeographic patterns and determining whether the six recognized subregions represent distinct floristic units. We found that both climate and space were significantly (p...
We investigated the diet of arctic foxes (Alopex lagopus) in the Karupelv valley, East Greenland, during the summer of 1997. Despite a low density, lemmings were the most utilized prey, comprising 65.3% of dry fecal weight in fresh feces. This demonstrates the importance of lemming species as prey for arctic foxes all through a lemming cycle. Birds, arctic hare (Lepus arcticus), and insects als...
Spatially variable selection has the potential to result in local adaptation unless counteracted by gene flow. Therefore, barriers to gene flow will help facilitate divergence between populations that differ in local selection pressures. We performed spatially and temporally replicated reciprocal field transplant experiments between inland and coastal habitats using males of the common blue dam...
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BACKGROUND Usefulness of anthropometric indices (AI) as predictors of CV risk is unclear and remains controversial. MATERIAL/METHODS To evaluate the correlation between AI and CV risk factors in the Croatian adult population and to observe possible differences between coastal and inland regions and urban and rural settlements. CRISIC-fm (ISRCTN31857696) is a prospective, randomized cohort stu...
Saltwater intrusion (SWI) is a type of pollution that adversely affects the quality groundwater in coastal aquifers. The Nile Delta aquifer (NDA) Egypt contains large amount freshwater. Increasing abstraction from and sea level rise have led to an increase SWI, which has reached up 100 km inland. Therefore, practical measures are required prevent further SWI. This study aims identify optimal we...
Seawater intrusion represents a high risk for the water supply, agriculture and industry activities in lower Seybouse region of North-Eastern Algeria. In order to analyze this risk, three-dimensional model was developed using MODFLOW MT3DMS codes predict seawater coastal aquifer. The application indicates that groundwater withdrawals result continuous decrease level an increase chloride concent...
Impacts of introgressive hybridisation may range from genomic erosion and species collapse to rapid adaptation and speciation but opportunities to study these dynamics are rare. We investigated the extent, causes and consequences of a hybrid zone between Anopheles coluzzii and Anopheles gambiae in Guinea-Bissau, where high hybridisation rates appear to be stable at least since the 1990s. Anophe...
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