according to the importance of obtaining accurate informations on drought conditions and it risk management for water right of major wetlands in iran, in this study climatic coefficients of palmer index for 17 watersheds in country was calibrated and zonation and their range in basins containing international wetlands were investigated. results showed that in wet conditions, in basins such as c...

concentrations of elements (as, co, cu, ni, mo, pb, v, cd, cr and zn) are studied in the surface sediments of bakhtegan lake, northwest of nyriz city, iran, to assess metal contamination. the average abundance order of trace elements content in bakhtegan lake sediments is cr>ni> v> zn> cu> co> as> pb> mo>cd. the comparison of trace elements concentration in bakhtegan lake sediments with toxicol...

The study was conducted to compare between nine cottonseeds genotypes (Gossipum hirsutum L) which included, two locale Iraqi Coker 310 and Lachata are three of the Bakhtegan, Khordad, Varamin from Iran, four them Cafko, Dunn 1047, Montana, Stoneville America (USA) on fiber quality. field experiment designed with randomised complete block design using replicates in Grdmal village, south Erbil, i...

Bakhtegan–TashkLakes (BTL) and Kamjan Marsh, one of the Ramsar sites with an area 1323 km 2 , have been shrunk due to groundwater overexploitation, construction two new dams drought. Evaporation BTL water significantly increased potentially toxic metal (PTMs) average total dissolved solids (TDS) from 45000 382000 mg/l. This study focuses on contamination sources 16 PTMs. The sampling include 24...

Eighteen previously unknown martian basins have been detected on Viking photographs. The smallest basins have diameters 50 to 100 km less than the smallest known basins on Mercury or the moon. On the latter two planets and the earth, basin morphology varies with increasing diameter: central peak (CP) basins have both central peaks and fragmentary peak rings; peak ring (PR) basins have only conc...

Pedogenesis and clay mineralogy of soils and rock samples were studied in a transect of calcareous, gypsiferous, saline soils and sediments of Bakhtegan lake bank in southern Iran. The main objectives of study were to determine the occurrence of clay minerals and factors controlling their distribution pattern and relative abundance in soils and parent materials. The soil parent material is high...

Stormwater detention basins are primarily designed to detain large volumes of storm runoff and trap suspended sediments and associated pollutants. Detaining and retaining nutrients are often not a design focus. The combination of variable moisture patterns in stormwater basins along with potential nutrient influxes may make these basins hotspots for nitrogen transformations such as denitrificat...