The late-holocene climate change, vegetation dynamics, lake-level changes and anthropogenic impacts in the lake urmia region, nw iran taravat talebi a, elias ramezani b, , morteza djamali c. Lake urmia meanwhile is following a similar path, with a 70 per cent surface water reduction over the last 20 years there are an estimated 40 dams on the 14 rivers emptying into lake urmia water loss in lake urmia has led to increased salinity (identified by the light blue water in the below images), which has affected the survival of fish. At urmia lake water level has fallen more than 3 meters restoration measures however, the severe long-term decline in precipitation at urmia lake over more than 50 years raises considerable concerns for the future, and will such as world bank can assist us to restore of lake urmia 5 | page 2 introduction.
The rapid decline in urmia lake levels essay 658 words | 3 pages introduction the rapid decline in urmia lake levels, the largest inland wetland in northwest of iran and the third hyper-saline lake in the world, as the biggest environmental disaster has been of great concern. In order to assess the dependency of groundwater level decline in association with the phenomenon of meteorological drought, the correlation coefficient has been calculated between the average water level of the groundwater (gri index) with spi index in different time scales, with and without delay. Two short (100 and 175 cm-long) sediment cores from the southwestern corner of lake urmia provide a record of vegetation dynamics, lake-level changes and the role of climate and humans in shaping the landscape around lake urmia over the last 2550 years.
A rapid decline satellite altimeter causes of the decline because lake urmia is a terminal lake with no significant water outflow the only way water leaves the lake is by evaporation therefore, if the lake declines it is either by increased evaporation or a decrease in water coming into the system lake urmia's water level has. As a consequence, the water level of lake urmia has been rapidly declining since 1995, with 61 m decline for the period 1995–2009 its surface area has been also changing by the rate of −1883 km 2 yr −1 , reaching from 5503 km 2 in 1998 to 2323 km 2 in 2011. Investigating the salinization and freshening processes of coastal groundwater resources in urmia aquifer, nw iran wednesday 11 may 2016 this paper presents the results of an assessment about interaction between urmia lake (ul) and coastal groundwater in the urmia aquifer (ua. Downloaded by [national forest service library], [azad henareh khalyani] at 11:04 03 june 2014 conclusion the rapid ecological decline of lake urmia has caused many environmental problems and presents serious risks to human and ecosystem health.
Lowest recorded level the surface area of urmia lake has declined by 80% to the lowest recorded level over the last two decades as a result, the salinity of the lake has sharply increased this. Lake urmia is an endorheic (closed or terminal basin with no outflow) and hyper- saline (a landlocked body of water with significant concentration of salts more than 35 g/l) basin situated in the northwest iran extending as long as 140 kilometres. Lowest recorded level the surface area of urmia lake has declined by 80% to the lowest recorded level over the last two decades as a result, the salinity of the lake has sharply increased. Precipitation levels in autumn 2017 were 53 percent below average ( financial tribune ) 90 percent amount that iran’s lake urmia has shrunk due to low rainfall and water diversion. Lake urmia in iran is another closed basin lake that has been shrinking continuous declines in water flowing into the lake have caused a general decline in its surface area since 1995.
The surface area of urmia lake has declined by 80% to the lowest recorded level over the last two decades as a result, the salinity of the lake has sharply increased this is disturbing the ecosystems, local agriculture and livelihoods, regional health, as well as tourism. Lake urmia is the largest lake in the middle east and the second largest salt lake on earth it is located 4,183 feet above sea level, lat 37 o to 385 o n, long 45 o to 46 o e it is approximately 140 km long in a north-south direction and about 85 km wide in its east-west extension with a surface area of 5,000 to 6,000 km 2. This loss of volume corresponds to an 11ft (33m) drop in the lake’s surface elevation and an approximately 50 percent decline in surface area from historic levels, according to the research the analysis found human use of water to be the cause of the lake’s decline. Current situation of urmia lake (trend of changes in level and environment ) considering the climate of the region, urmia lakes basin could potentially hold about 6800 million cubic meters of water, which flow into the lake through 21 rivers.
The surface area of lake urmia has declined by 80% to the lowest recorded level over the last two decades as a result, the salinity of the lake has sharply increased this is disturbing the ecosystems, local agriculture and livelihoods, regional health, as well as tourism. The rapid shrinkage of lake urmia, one of the world's largest saline lakes located in northwestern iran, is a tragic wake-up call to revisit the principles of water resources management based on the socio-economic and environmental dimensions of sustainable development. This basin is located near urmia lake which groundwater level decline of this basin effect on urmia drought for this purpose land use map were extracted over the three time periods, 1990, 2007 and 2015, satellite images etm, tm. In the late 1990s, lake urmia, in north-western iran, was twice as large as luxembourg and the largest salt-water lake in the middle east since then it has shrunk substantially, and was sliced in.
Lake urmia, in northwest iran, is the second most saline lake in the world during the past two decades, the level of water has markedly decreased in this paper, climate of the lake region is investigated by using data from four meteorological stations near the lake. Findings show, water level decline of urmia lake has the most negative influence on the physical (salinization of lands, declining diversification in crops, destruction of orchards and pastures, increasing contamination of water resources and. This decline in lake level is more observed level of great salt lake (dashed red desiccation has occurred in numerous other closed basins nationally and internationally, including owens lake in california16, lake urmia in iran, and the aral sea in kazakhstan and uzbekistan in each case the primary cause. Meteorological factors affecting the sudden decline in lake urmia’s water level foroozan arkian1 & sharon e nicholson2 & bahareh ziaie1 received: 5 november 2015/accepted: 31 october 2016/published online: 15 november 2016 # springer-verlag wien 2016 abstract lake urmia, in northwest iran, is the second most.
The measurement of the level changes in urmia lake by satellite showed an increase from 1992 to 1995 and decline from 1995 through 2003 (us geological survey) a concomitant increase salinity (220–300 g/l) was observed during the years of declining elevation [ 32 . Lake urmia summertime bathers wade into waters colored red by salt-loving bacteria and algae tourists from across iran have come here for generations, but the number of visitors has fallen as the. Therefore, urmia lake level reached to an amount of 1273 m and 25 cm, page 2 of 8 increase from 1992 to 1995 and decline from 1995 to the strong currents, despite the presence of the cause- spring 1969 resulting from the rapid surface runoff from great salt lake, utah (1992–2007) (hydrograph from us.