Evaluation the landuse effects on surfacewater quality and pollution transport modeling by mathematical model (AQUALM) (2000-2001)
2002
Chaderi, Naseh | Abbasi, Ali Akbar, . | Ghoddosi, Jamal | Tabatabai , Mahmoud Reza
The undesirable changes is solicitude in Khazar catchment is bigger than only water qualities undesirable changes, and the critical range has tended to threaten, ecological resources, decreasing the charms of pleasance & tourism centers, the economical incomes from marine biomas and aquatic ecosystems. Although, it has controlled the point source pollution, it has not caused any important development in improving of world's water resources quality, because the non point sources pollution has the main role in water quality. This investigate showes the role of landuse type on pollution production and transported in Sia - Darvishan basin. The main aim of research is determining pollutants like T.P., T.N., B.O.D5 and T.S.S, transport from each landuse area, calculation the annual load to river flow, simulating basin's hydrology and pollution transport, presentation desirable suggest for water resources conservation and monitoring. The catchment, which was studied, had 36.2% agricultural landuse, 63.1 % natural land use (forest and range) and 0.7% urban landuse. At first the landuse types were determined and landuse map was prepared using digital information data and other maps. From each landuse type the run off-was sampled in 3 treatment 4 replication to measure pollution concentration. In modeling part of research, model determines was compared with the recorded hydrological data. Then the AQUALM model was made compatible with it's sensitometric and calibration. At last the hydrological and pollution function of basin was simulated and model determines was evaluated at dry and wet years. Statistical analysis showed that there is significant difference between each land use type. The results showed that a unit area of urban landuse has more pollutant effects than the others, agricultural land use is ranked the 2nd and natural landuse is the last one in the pollutants list. So the AQUALM is a consistent model in catchment,s conditions even if it has not been calibrated.
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