Revision as of 10:06, 28 January 2015

Summary

Natural, Historic, Economic, Regional, and Political Framework

Urmia Lake in Northwestern Iran is the 20th largest lake and prior to September 2010 was the second largest hypersaline lake in the world (Figure 1). The lake is also the largest inland body of salt water in the Middle East area with an area that varied from 2,000 to 2,300 square mi (5,200 to 6,000 square km). It is about 87 mi (140 km) long and 25–35 mi (40–55 km) wide, with a maximum depth of 53 ft (16 m) therefore it is classified as a shallow lake, with high evaporation, (Sorgeloos 1987 and Delju et al. 2013). The annual average of basin temperature is 11 ˚C around the lake, and 2.5 ˚C in mountain areas . (Razmara, 2013). The average temperature and rainfall as measured at Urmia station is provided in Figure 5. Urmia1.jpg The lake basin is one of the most influential and valuable aquatic ecosystems in the country. Some 1500 species of vascular plants, including unique Artemia sp., are located in the wetlands of the lake which represent 15% of the total number of flora species found in the country. Because of its unique natural and ecological features, the lake and its surrounding wetlands have been designated as a National Park, a Ramsar Site and a UNESCO Biosphere Reserve (CIWP 2008). Urmia2.jpg More than seven million people are living in two neighboring provinces around the lake, and agriculture, horticulture, animal husbandry, handicraft making, apiculture, mining, business, and industry play a major role in the region (Delju et al 2013). The basin itself has include a population of about 4.6 million in itself. The lake basin, as a socio-ecological region, faced extreme water shortages in the recent years due to water overuse and climate change (Alipour 2006, Zarghami 2011). Because of the intense agricultural development and rapid urbanization, the groundwater level in some parts of the basin has decreased by up to 16 meters. The water level of the lake and area are now below the critical level (Figure 2). The lake requires a minimum inflow of 3.1 billion cubic meters per year to compensate for evaporation, otherwise the wind-blown salty dusts will threaten the health of people in the area.

The normal total catchment area of the lake was about 51,876 km2,which comprised 3.15% of the entire country and included 7 % of the total surface water in Iran (Urmia Lake Basin Integrated Water Resources Management Home Page). The lake is now desiccating as shown below. Urmia3.jpg

The Lake Ecosystem

Lake Urmia provides habitat for more than 211 species of birds, such as flamingos, pelicans, spoonbills and gulls; 41 species of reptiles; 7 species of amphibians and 27 species of mammals inhabit the lake (Figure 8). Artemia (brine shrimp) lives in Lake Urmia and provides an important food source for migrating water birds (http://www.oxu.ca/lake/, accessed 12-06-2014).

The Zarrinehrud river is one of the main inflows to the lake. The Zarrinehrud River basin, located in southeast of the lake, has an area of about 11578 km2. The Zarrinehrud River originates in the Chehelcheshmeh Mountains between Saghez and Bukan and flows toward the Urmia Lake with length of 240 km long and an average annual discharge of about 1971 MCM. The Martyr Kazemi dam, which is also called the Zarrinehrud dam, was built on this river in 1970. It is located in West Azerbaijan, 35 km from Bukan. It provides water for the Mianduab plain, parts of the Bonab, and Malekan plains. The gross agricultural area of the basin is 64640 ha, of which 58171 ha is irrigable. These agricultural areas are very crucial for the life of the people in the region (Safari, et al. 2014). In addition to agricultural consumption, the Zarrinehrud River supplies more than 40% of the domestic water demand of the city of Tabriz. The maximum annual water transmission is designed to be 157 MCM/Y. The project’s goals are the refinement and transmission of 5 m3/s, mainly for domestic consumption in the cities of Tabriz, Mianduab, Bonab, and Azarshahr and to provide the required water for a petrochemical company, a refinery, the Tabriz thermal power plant, the Sahand power plant and the Martyr Salimi industrial park. Thus because of the limited water supply there is a conflict between the water users which the Iran Water Resources Management Company (IRWRMC) could control with appropriate price strategy.

Urmia4.jpg

Agriculture, Irrigation and Development in the Lake Urmia Basin

In view of the dependence of agricultural operations on runoff and ground water resources, 35 dams have been built on 21 rivers flowing to the lake. All rivers in the basin flow towards Urmia Lake. As a result, the combined effect of these dams along with high exploitation of ground water intensified by recent drought cycles has brought the lake to a critical situation. The lake level variation equaled to 3 m from August 1998 to August 2001, approximately; however, the receding level has gained more rapid pace since early 2010. The level of variation equaled to 6.8 m from January 1992 to August 2010 (Figure 6). As a result, this has rapidly changed shorelines and caused a disappearance of the existing landscape in the region. Persistence of this phenomenon plus other subsidiary impacts of climate change such as rapid reduction in ground water resources, loss of land productivity, degradation of agricultural lands, soil erosion, and salinization associated with water scarcity seem to be strong enough to trigger a possible future migration and human displacement of a vulnerable rural population from dry lands to other areas in the country. (Delju et al 2013)

Urmia5.jpg

In addition to mentioned problems, a causeway was also constructed to facilitate transportation between cities on the east and west sides of the lake. Because the majority of water flow to the lake originates from the south, the causeway has changed the circulation pattern, resulting in many environmental problems. Results of investigations show that in early 2003, climatic conditions and the causeway caused the salinity of the lake to increase up to 250 ppt in the southern part; while, it exceeded 280 ppt in the northern part (Zarghami, 2011) Artemia, a key link in the lake ecosystem’s food chain, could tolerate salinity as high as 300 mg/l. However, its population growth is extremely low at high salinity; furthermore, most of its physiological activities will stop (Agh 2006). With continued salinity increase, the diminshed Artemia populations cannot recover fully, especially in the northern part, (Abatzopoulos et al. 2006, Abbaspour and Nazaridost 2007).

Because of spatio-temporal discrepancy among natural flows and also the water demands numerous dams are built on the streams running to the lake. In the Table 1 their situation is represented (CIWP, 2014). Their locations are also depicted in Figure 9. These dams are primarily for water storage for irrigation purposes.

Table1- The numbers of the dams located in Urmia Lake basin (modified from CIWP, 2014) {

Issues and Stakeholders

Agricultural Lands: Importance of agricultural productivity and negative impacts from agricultural water use

Tourism – as lake levels drop, the scenic and recreational value of the lake also decreases

Link between the water level in Lake Urmia, public health, and environmental health problems

Industrial pollutants and heavy metals, and the use of large quantities of pesticides to control parasites and weeds have accumulated in groundwater and surface water that inflow to the lake. Therefore, Urmia Lake's water contains Cl-, Na+, Ca2+, Mg2+, Hco3-, K+, Li, So42+, and F (Abazopoulos et al., 2006). In recent years, half of the lake has changed to saline area that contains these toxic materials. If winds blow from this polluted area near the lake to other places in the region, the consequence would be a huge change in the cycle of region's ecosystem also in people's life. For example, in the cities, by breathing this toxic air, people will have many illnesses such as breathing problems.

Agricultural Lands: Importance of agricultural productivity and negative impacts from agricultural water use

Tourism – as lake levels drop, the scenic and recreational value of the lake also decreases

Link between the water level in Lake Urmia, public health, and environmental health problems

Industrial pollutants and heavy metals, and the use of large quantities of pesticides to control parasites and weeds have accumulated in groundwater and surface water that inflow to the lake. Therefore, Urmia Lake's water contains Cl-, Na+, Ca2+, Mg2+, Hco3-, K+, Li, So42+, and F (Abazopoulos et al., 2006). In recent years, half of the lake has changed to saline area that contains these toxic materials. If winds blow from this polluted area near the lake to other places in the region, the consequence would be a huge change in the cycle of region's ecosystem also in people's life. For example, in the cities, by breathing this toxic air, people will have many illnesses such as breathing problems.

Agricultural Lands: Importance of agricultural productivity and negative impacts from agricultural water use

Tourism – as lake levels drop, the scenic and recreational value of the lake also decreases

Link between the water level in Lake Urmia, public health, and environmental health problems

Industrial pollutants and heavy metals, and the use of large quantities of pesticides to control parasites and weeds have accumulated in groundwater and surface water that inflow to the lake. Therefore, Urmia Lake's water contains Cl-, Na+, Ca2+, Mg2+, Hco3-, K+, Li, So42+, and F (Abazopoulos et al., 2006). In recent years, half of the lake has changed to saline area that contains these toxic materials. If winds blow from this polluted area near the lake to other places in the region, the consequence would be a huge change in the cycle of region's ecosystem also in people's life. For example, in the cities, by breathing this toxic air, people will have many illnesses such as breathing problems.

Analysis, Synthesis, and Insight

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Key Questions

Integration across Sectors: How can consultation and cooperation among stakeholders and development partners be better facilitated/managed/fostered?

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