نتایج جستجو برای: rivers and springs beauty
تعداد نتایج: 16832669 فیلتر نتایج به سال:
Amphipod fauna of Moldova remains one of the least known in Europe with the most recent data upon species distribution being already almost 50 years old. In this paper, we summarize the knowledge upon the distribution of amphipods in Moldovan inland waters based on literature survey combined with our new original data and present a comprehensive checklist of recorded amphipod species. The new o...
[1] Numerous hot springs flow within the steeply incised gorges of the central Nepal Himalayan front. The spring fluids have total dissolved solids (TDS) up to 7000 mg/L and Na, and K typically comprise >50% of the cationic charge, indicating that high-temperature silicate alteration is the dominant source of hot spring alkalinity. HCO3 is normally the dominant anion. Sr isotope ratios from the...
This study produced a drought map for the Fenhe River basin covering the period from 150 BC to 2012 using regional historical drought records. Based on meteorological and hydrological features, the characteristics and causes of water scarcity in the Fenhe River basin were examined, along with their impact on the national economy and ecological environment. The effects of water scarcity in the b...
Climate change is predicted to increase water temperatures in many lotic systems, but little is known about how changes in air temperature affect lotic systems heavily influenced by groundwater. Our objectives were to document spatial variation in temperature for spring-fed Ozark streams in Southern Missouri USA, create a spatially explicit model of mean daily water temperature, and use downsca...
One of the aims of the Water Framework Directive is to derive Europe-wide environmental quality standards that are scientifically based and protective of surface waters. Accounting for water type-specific bioavailability corrections presents challenges and opportunities for metals research. In this study, we present generally applicable approaches for tiered risk assessment of chemicals for pro...
The possible effects of changing climate on a southern and a north-eastern English river (the Thames and the Yorkshire Ouse, respectively) were examined in relation to water and ecological quality throughout the food web. The CLASSIC hydrological model, driven by output from the Hadley Centre climate model (HadCM3), based on IPCC low and high CO(2) emission scenarios for 2080 were used as the b...
Heavy metals concentrations in water and sediment samples collected from five streams in Tarkwa gold mining district of Ghana were studied. The water and sediment samples were analysed for As, Al, Cd, Co, Cu, Hg, Mn, Sb, Th, and V, using Instrumental Neutron Activation Analysis (INAA). The results of this study generally showed elevated levels of all the ten examined elements in the water and s...
[1] Submarine groundwater discharge (SGD) into the ocean is increasingly recognized as an important component of land-ocean interaction. Numerous geological settings may be the source of terrestrially derived SGD, including spatially extensive sand dune systems, which are a common coastal setting in tropical, subtropical, and temperate regions throughout the world. Within the catchment of the G...
a i m c h m e p m n t 3 t i This is the 119 presidential address to one of the oldest urgical societies in North America. The “Western” was ounded in 1891 in Topeka, KS, which at the time was ndeed a western outpost in the United States. Originally ntended to have a geographic distribution of states borderng on and west of the Ohio and Mississippi Rivers and heir major tributaries, the associat...
Kathmandu valley is believed to be a lake in pre-historic period. But later, it became suitable for human settlement and the civilization started in Kathmandu. With increase in population, the available water becomes insufficient and people started to search new sources by constructing well and stone spout. With time as the city grew, people faced the shortage of water. The river water was dete...
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