In Iraq, the principal rivers are the Tigris, Shatt Al-Arab and Euphrates. From their headwater sources in the mountains of eastern Türkiye, these rivers descend through valleys and gorges and flow into the uplan...In Iraq, the principal rivers are the Tigris, Shatt Al-Arab and Euphrates. From their headwater sources in the mountains of eastern Türkiye, these rivers descend through valleys and gorges and flow into the uplands of Syria and northern and central alluvial plain of Iraq. The Euphrates and Tigris Rivers confluence to form the Shatt Al-Arab river at Al-Qurnah which flows into the Persian Gulf. From sources in the Zagros Mountains other tributaries join the Tigris from the east. The Tigris and Euphrates rivers flow in a southeastern direction through the central plain and discharge into the Mesopotamian Marshes, which include permanent marshes, lakes, and riparian habitat. The rivers and their tributaries drain an area of 879,790 km<sup>2</sup> which includes almost the entire area of Iraq as well as land in Syria, Türkiye, Kuwait and Iran. The region has historical importance as part of the Fertile Crescent region and where Mesopotamian civilization first emerged. The post war reconstruction efforts in the Yusifiyah township, an important food production region for Baghdad, illustrate the importance of these water resources. In addition, the advent of soil tunnels by Iraqi insurgents within the riverine corridors will make reconstruction of this resource more complex. The primary objectives of this study are to assess lessons learned, manage, and restore the Tigris, Euphrates, and Shatt Al-Arab river system lifeline in Iraq.展开更多
The Islamic Republic of Iran’s principal rivers are the Karun and Shatt al-Arab. The Karun River has a 950 km length. The Karun River starting point is the convergence of the Amand, Kuhrang, and Bazoft rivers. From t...The Islamic Republic of Iran’s principal rivers are the Karun and Shatt al-Arab. The Karun River has a 950 km length. The Karun River starting point is the convergence of the Amand, Kuhrang, and Bazoft rivers. From their headwater sources in the mountains of eastern Iran, these rivers descend through valleys and gorges and flow into the plains of Iran. The Shatt al-Arab River drains an area of 879,790 square kilometers which includes land in Iran, Syria, Türkiye, Kuwait, and Iraq. The Karun joins Shatt al-Arab 110 km downriver from the confluence of the Euphrates and Tigris Rivers and flows 85 km into the Persian Gulf. The Karun river flows in a southwestern direction through the central plain and provides about 10 per cent of the water balance of Iran’s largest wetland, the Shadegan, which includes permanent marshes, lakes, and riparian habitats. The article summarizes a vast array of publications on the stated topic and this civilizationally important region in order to draw additional attention to its interdependent environmental, economic and political problems the successful resolution of which is only possible with the participation of the entire research community.展开更多
Objective:To study spatial and temporal variability of fish assemblage in the Shatt Al-Arab River.Methods:This study was conducted from December 2011 to November 2012.Water temperature,salinity,dissolved oxygen and tr...Objective:To study spatial and temporal variability of fish assemblage in the Shatt Al-Arab River.Methods:This study was conducted from December 2011 to November 2012.Water temperature,salinity,dissolved oxygen and transparency were measured from three sites in the river.Several fishing methods were adopted to collect fish including gill nets,cast net,electro-fishing and hook and lines.Associations between the distribution of fish species and the environmental variables were quantified by using canonical correspondence analysis.Results:The results showed that the fish assemblage consisted of 58 species representing 46 genera and 27 families belong to Osteichthyes except one(Carcharhinus leucas)relate to Chondrichthyes.Number of species increased in summer and autumn months and sharply decreased in winter.Tenualosa ilisha was the most abundant species comprising 27.4%of the catch,followed by Carassius auratus(23.7%)and Liza klunzingeri(10.6%).The dominance(D_(3))value for the main three abundant species was 61.7%.Nine species were caught for the first times from the river include eight marine.The overall values of diversity index ranged from 0.67 in March to 2.57 in October,richness index from 2.64 in January to 3.71 in September and evenness index from 0.22 in March to 0.73 in August.Conclusions:Spatially,the fish assemblages of Shatt Al-Arab River can be divided into three ecological fish guilds,namely,common species,seasonal species and occasional species.展开更多
Objective:To assess suitability of the water quality of Shatt al-Arab River for protection of aquatic life,potable water supply and irrigation uses.Methods:The Shatt al-Arab River was monitored on a monthly basis from...Objective:To assess suitability of the water quality of Shatt al-Arab River for protection of aquatic life,potable water supply and irrigation uses.Methods:The Shatt al-Arab River was monitored on a monthly basis from July 2009 to June 2010.A water quality index(WQI)was calculated to assess the suitability of water for protection of aquatic life,potable water supply and irrigation uses during the dry season from July to December 2009 and the wet season from January until June 2010.Results:The results of the WQI showed that the lowest water quality values were scored during the dry season for all three uses of the river.Marginal water quality values were recorded for protection of aquatic life and fair(upstream)to poor(downstream)water quality values were recorded for irrigation uses.Moreover,the river water was not suitable for potable water supply without elaborate treatment.Conclusions:Deterioration of the Shatt al-Arab water quality has been attributed to reduced freshwater discharges from Tigris and Euphrates Rivers,low annual precipitations and an advancing salt wedge from the Arabian Gulf.However,a combination of those factors such as low riverine discharge and advancing salt wedge with a continuous discharge of agriculture,oil industry and urban point effluent has polluted the waters and fostered the decline of the Shatt al-Arab River water quality during the study period.The study indicated that application of WQIs was a useful tool to monitor and assess the overall water quality of the Shatt al-Arab River.展开更多
The temporal and spatial variations of seawater temperature,salinity,and tidal fluctuations are important parameters for understanding the hydrodynamic,water quality,and marine biological activity in the seawater.It i...The temporal and spatial variations of seawater temperature,salinity,and tidal fluctuations are important parameters for understanding the hydrodynamic,water quality,and marine biological activity in the seawater.It is also important to study and understand the probability and statistical aspects of these parameters for the planning and implementation of different types of marine projects.These parameters were measured at five different locations around Boubyan Island,Kuwait,for a span of almost one year during 2015-16.Based on the analysis of the measured data,it is found that the seawater salinity has varied from 34.14 to 48.31 ppt.The seawater temperature is also found to vary from 10.83 oC to 35.67 oC.The seawater level has varied from-2.694 m to 2.378 m with respect to the mean sea level.It is found that the peak of the probability density of seawater level is flat valued,whereas the probability density of salinity and seawater temperature is multimodal.A comparison of present and past measured seawater temperatures revealed that in Khor Al-Sabiya,the seawater temperature is increasing at the rate of 0.034 oC/year,which clearly indicates the effect of global warming.A similar study reveals that the annual average increase in salinity at Khor Al-Sabiya is 0.38 ppt,which clearly indicates a significant reduction of freshwater flow from Shatt Al-Arab into the Arabian Gulf.Since Kuwait is investing in many projects around the Boubyan Island,the results of this study will be useful for the integrated and sustainable development of Boubyan and Failaka Islands in Kuwait.展开更多
The purpose of this study is to investigate the effect of using Bicarbonate and Calcium parameters as alternatives to the lithostratigraphic units covered the catchment area, on water quality index (WQI) values that h...The purpose of this study is to investigate the effect of using Bicarbonate and Calcium parameters as alternatives to the lithostratigraphic units covered the catchment area, on water quality index (WQI) values that have been implemented with GIS technique at Wadi Al-Arab Dam. The analyzed results (by WQI method) have been used to depict water quality for the two approaches. Based on physico-chemical parameters, the calculated values for WQI over the 3-year for study period were 169, 168, and 157, respectively. While the WQI values were 184, 183 and 172, respectively, as a result of incorporated Bicarbonate and Calcium parameters in WQI calculations that significantly contributed to increasing the WQI. The elevated values may be attributed to the influence of carbonate stone dissolution and mechanical erosion under weathering conditions that are prevalent during winter season in the catchment area. As a consequence of lithostratigraphic unites product and GIS technique integration and normalization processes, most of water quality ranks are good and only autumn season has poor water quality in the 2012 and 2013, while in 2014 it has good water quality in the same season. The WQI values increase in general trend from winter to autumn seasons during the study period that may be referred to outflow by daily consumption, evaporation rising, and seepage water. The analysis shows that the modified water quality values of the Wadi Al-Arab Dam Reservoir (WADR) vary after using Bicarbonate and Calcium parameters by constant value. Generally, the results signify that the WADR is not polluted based on the physical and chemical characteristics of water.展开更多
The groundwater quality of Wadi Al Arab aquifer, northwest Jordan, was assessed for its high molybdenum concentrations, which reach 1.62 mg/L. This value of Mo-concentration was far beyond the Jordan Institution for S...The groundwater quality of Wadi Al Arab aquifer, northwest Jordan, was assessed for its high molybdenum concentrations, which reach 1.62 mg/L. This value of Mo-concentration was far beyond the Jordan Institution for Standards and Metrology (JISM) and World Health Organization (WHO) guidelines. Hydro-geochemical studies were carried out in order to assess the chemistry of the groundwater quality focusing on identifying the hydrogeochemical processes and mechanisms that are involved in the high Mo concentration. The water quality data of Wadi Al Arab boreholes (1986-2018) was collected, and the dataset analyzed. Interpretation of hydrochemical data showed that the anions are dominated by? ?with abundance order of?, while the main cation is Ca2+, with abundance order of Ca2+ > Mg2+ > Na+ > K+;water type is . The reason is the passage of groundwater through carbonate rocks. The distribution of the sampling points in the Gibbs diagram showed that the majority of samples are plotted within the field of rock weathering, which indicates that the main factor controlling dissolved hydrochemical components of the water samples is the dissolution of the rock-forming minerals. The scattered plot of the Mo with other critical heavy metals shows two different trend lines suggesting initiation of molybdenum to groundwater which is probably derived from oil shale and phosphate. The effects of pH and redox potential on Mo mobility in water are reviewed using the paurbaix diagram. The Mo species of the sampled wells are confined to the field of : anoxic/non-sulfidic condition (Fe reduction) which is located in the unconfined part of the aquifer, and which is sulfidic condition (low and high) in the confined aquifer.展开更多
Objective:To evaluate the effect of some different water temperatures on growth of aquatic plants (Salvinia natans andCeratophyllum demersum). <br> Methods:The aquatic plants were brought from Shatt Al-Arab Rive...Objective:To evaluate the effect of some different water temperatures on growth of aquatic plants (Salvinia natans andCeratophyllum demersum). <br> Methods:The aquatic plants were brought from Shatt Al-Arab River in 2016. Equal weights of aquatic plants were aquacultured in aquaria, and were exposed to three different temperatures ( 12, 22 and 32°C). <br> Results: The results showed that the two plants did not show significant differences with respect to their effects on pH and electrical conductivity values. Time and temperature did not affect the values of pH and electrical conductivity. The values of dissolved oxygen was significantly influenced with variation of time and temperature, while the two plants did not have significant differences on dissolved oxygen values, nitrate ion concentration and was not significantly influenced with variation of plant species or temperature or time. Plant species and temperature significantly affected phosphate ion concentration, while the time did not significantly influence the concentration of phosphate ion. Chlorophyll a content and biomass were significantly influenced with the variation of plant species, and temperature . <br> Conclusions:Aquatic plants has a species specific respond to temperatures change in their environment. Water plant,Ceratophyllum demersum is more tolerant to temperatures change thanSalvinia natans.展开更多
文摘In Iraq, the principal rivers are the Tigris, Shatt Al-Arab and Euphrates. From their headwater sources in the mountains of eastern Türkiye, these rivers descend through valleys and gorges and flow into the uplands of Syria and northern and central alluvial plain of Iraq. The Euphrates and Tigris Rivers confluence to form the Shatt Al-Arab river at Al-Qurnah which flows into the Persian Gulf. From sources in the Zagros Mountains other tributaries join the Tigris from the east. The Tigris and Euphrates rivers flow in a southeastern direction through the central plain and discharge into the Mesopotamian Marshes, which include permanent marshes, lakes, and riparian habitat. The rivers and their tributaries drain an area of 879,790 km<sup>2</sup> which includes almost the entire area of Iraq as well as land in Syria, Türkiye, Kuwait and Iran. The region has historical importance as part of the Fertile Crescent region and where Mesopotamian civilization first emerged. The post war reconstruction efforts in the Yusifiyah township, an important food production region for Baghdad, illustrate the importance of these water resources. In addition, the advent of soil tunnels by Iraqi insurgents within the riverine corridors will make reconstruction of this resource more complex. The primary objectives of this study are to assess lessons learned, manage, and restore the Tigris, Euphrates, and Shatt Al-Arab river system lifeline in Iraq.
文摘The Islamic Republic of Iran’s principal rivers are the Karun and Shatt al-Arab. The Karun River has a 950 km length. The Karun River starting point is the convergence of the Amand, Kuhrang, and Bazoft rivers. From their headwater sources in the mountains of eastern Iran, these rivers descend through valleys and gorges and flow into the plains of Iran. The Shatt al-Arab River drains an area of 879,790 square kilometers which includes land in Iran, Syria, Türkiye, Kuwait, and Iraq. The Karun joins Shatt al-Arab 110 km downriver from the confluence of the Euphrates and Tigris Rivers and flows 85 km into the Persian Gulf. The Karun river flows in a southwestern direction through the central plain and provides about 10 per cent of the water balance of Iran’s largest wetland, the Shadegan, which includes permanent marshes, lakes, and riparian habitats. The article summarizes a vast array of publications on the stated topic and this civilizationally important region in order to draw additional attention to its interdependent environmental, economic and political problems the successful resolution of which is only possible with the participation of the entire research community.
文摘Objective:To study spatial and temporal variability of fish assemblage in the Shatt Al-Arab River.Methods:This study was conducted from December 2011 to November 2012.Water temperature,salinity,dissolved oxygen and transparency were measured from three sites in the river.Several fishing methods were adopted to collect fish including gill nets,cast net,electro-fishing and hook and lines.Associations between the distribution of fish species and the environmental variables were quantified by using canonical correspondence analysis.Results:The results showed that the fish assemblage consisted of 58 species representing 46 genera and 27 families belong to Osteichthyes except one(Carcharhinus leucas)relate to Chondrichthyes.Number of species increased in summer and autumn months and sharply decreased in winter.Tenualosa ilisha was the most abundant species comprising 27.4%of the catch,followed by Carassius auratus(23.7%)and Liza klunzingeri(10.6%).The dominance(D_(3))value for the main three abundant species was 61.7%.Nine species were caught for the first times from the river include eight marine.The overall values of diversity index ranged from 0.67 in March to 2.57 in October,richness index from 2.64 in January to 3.71 in September and evenness index from 0.22 in March to 0.73 in August.Conclusions:Spatially,the fish assemblages of Shatt Al-Arab River can be divided into three ecological fish guilds,namely,common species,seasonal species and occasional species.
文摘Objective:To assess suitability of the water quality of Shatt al-Arab River for protection of aquatic life,potable water supply and irrigation uses.Methods:The Shatt al-Arab River was monitored on a monthly basis from July 2009 to June 2010.A water quality index(WQI)was calculated to assess the suitability of water for protection of aquatic life,potable water supply and irrigation uses during the dry season from July to December 2009 and the wet season from January until June 2010.Results:The results of the WQI showed that the lowest water quality values were scored during the dry season for all three uses of the river.Marginal water quality values were recorded for protection of aquatic life and fair(upstream)to poor(downstream)water quality values were recorded for irrigation uses.Moreover,the river water was not suitable for potable water supply without elaborate treatment.Conclusions:Deterioration of the Shatt al-Arab water quality has been attributed to reduced freshwater discharges from Tigris and Euphrates Rivers,low annual precipitations and an advancing salt wedge from the Arabian Gulf.However,a combination of those factors such as low riverine discharge and advancing salt wedge with a continuous discharge of agriculture,oil industry and urban point effluent has polluted the waters and fostered the decline of the Shatt al-Arab River water quality during the study period.The study indicated that application of WQIs was a useful tool to monitor and assess the overall water quality of the Shatt al-Arab River.
基金supported by the Kuwait Foundation for the Advancement of Sciences(KFAS)(Project No.2012-1401-01)。
文摘The temporal and spatial variations of seawater temperature,salinity,and tidal fluctuations are important parameters for understanding the hydrodynamic,water quality,and marine biological activity in the seawater.It is also important to study and understand the probability and statistical aspects of these parameters for the planning and implementation of different types of marine projects.These parameters were measured at five different locations around Boubyan Island,Kuwait,for a span of almost one year during 2015-16.Based on the analysis of the measured data,it is found that the seawater salinity has varied from 34.14 to 48.31 ppt.The seawater temperature is also found to vary from 10.83 oC to 35.67 oC.The seawater level has varied from-2.694 m to 2.378 m with respect to the mean sea level.It is found that the peak of the probability density of seawater level is flat valued,whereas the probability density of salinity and seawater temperature is multimodal.A comparison of present and past measured seawater temperatures revealed that in Khor Al-Sabiya,the seawater temperature is increasing at the rate of 0.034 oC/year,which clearly indicates the effect of global warming.A similar study reveals that the annual average increase in salinity at Khor Al-Sabiya is 0.38 ppt,which clearly indicates a significant reduction of freshwater flow from Shatt Al-Arab into the Arabian Gulf.Since Kuwait is investing in many projects around the Boubyan Island,the results of this study will be useful for the integrated and sustainable development of Boubyan and Failaka Islands in Kuwait.
文摘The purpose of this study is to investigate the effect of using Bicarbonate and Calcium parameters as alternatives to the lithostratigraphic units covered the catchment area, on water quality index (WQI) values that have been implemented with GIS technique at Wadi Al-Arab Dam. The analyzed results (by WQI method) have been used to depict water quality for the two approaches. Based on physico-chemical parameters, the calculated values for WQI over the 3-year for study period were 169, 168, and 157, respectively. While the WQI values were 184, 183 and 172, respectively, as a result of incorporated Bicarbonate and Calcium parameters in WQI calculations that significantly contributed to increasing the WQI. The elevated values may be attributed to the influence of carbonate stone dissolution and mechanical erosion under weathering conditions that are prevalent during winter season in the catchment area. As a consequence of lithostratigraphic unites product and GIS technique integration and normalization processes, most of water quality ranks are good and only autumn season has poor water quality in the 2012 and 2013, while in 2014 it has good water quality in the same season. The WQI values increase in general trend from winter to autumn seasons during the study period that may be referred to outflow by daily consumption, evaporation rising, and seepage water. The analysis shows that the modified water quality values of the Wadi Al-Arab Dam Reservoir (WADR) vary after using Bicarbonate and Calcium parameters by constant value. Generally, the results signify that the WADR is not polluted based on the physical and chemical characteristics of water.
文摘The groundwater quality of Wadi Al Arab aquifer, northwest Jordan, was assessed for its high molybdenum concentrations, which reach 1.62 mg/L. This value of Mo-concentration was far beyond the Jordan Institution for Standards and Metrology (JISM) and World Health Organization (WHO) guidelines. Hydro-geochemical studies were carried out in order to assess the chemistry of the groundwater quality focusing on identifying the hydrogeochemical processes and mechanisms that are involved in the high Mo concentration. The water quality data of Wadi Al Arab boreholes (1986-2018) was collected, and the dataset analyzed. Interpretation of hydrochemical data showed that the anions are dominated by? ?with abundance order of?, while the main cation is Ca2+, with abundance order of Ca2+ > Mg2+ > Na+ > K+;water type is . The reason is the passage of groundwater through carbonate rocks. The distribution of the sampling points in the Gibbs diagram showed that the majority of samples are plotted within the field of rock weathering, which indicates that the main factor controlling dissolved hydrochemical components of the water samples is the dissolution of the rock-forming minerals. The scattered plot of the Mo with other critical heavy metals shows two different trend lines suggesting initiation of molybdenum to groundwater which is probably derived from oil shale and phosphate. The effects of pH and redox potential on Mo mobility in water are reviewed using the paurbaix diagram. The Mo species of the sampled wells are confined to the field of : anoxic/non-sulfidic condition (Fe reduction) which is located in the unconfined part of the aquifer, and which is sulfidic condition (low and high) in the confined aquifer.
文摘Objective:To evaluate the effect of some different water temperatures on growth of aquatic plants (Salvinia natans andCeratophyllum demersum). <br> Methods:The aquatic plants were brought from Shatt Al-Arab River in 2016. Equal weights of aquatic plants were aquacultured in aquaria, and were exposed to three different temperatures ( 12, 22 and 32°C). <br> Results: The results showed that the two plants did not show significant differences with respect to their effects on pH and electrical conductivity values. Time and temperature did not affect the values of pH and electrical conductivity. The values of dissolved oxygen was significantly influenced with variation of time and temperature, while the two plants did not have significant differences on dissolved oxygen values, nitrate ion concentration and was not significantly influenced with variation of plant species or temperature or time. Plant species and temperature significantly affected phosphate ion concentration, while the time did not significantly influence the concentration of phosphate ion. Chlorophyll a content and biomass were significantly influenced with the variation of plant species, and temperature . <br> Conclusions:Aquatic plants has a species specific respond to temperatures change in their environment. Water plant,Ceratophyllum demersum is more tolerant to temperatures change thanSalvinia natans.
