PSIAC empirical method is considered as one of the methods calculating and
estimating the amount of erodibility and sedimentation of sedimentary deposits
in sedimentary basins and dams’ reservoirs. This method is based on analyzing
nine influential factors including: surface geology, solid, weather, runoff,
unpaved area, limited plant coverage, land usage, high lands erosion,
river erosion and sediment transportation. These factors are rated according
to their level of importance. The case study of this research is Lali Water Catchment,
Khuzestan, Iran. The amount and intensity of adorability will be
ranked as low, moderate and high. This research is based on field work, laboratorial
studies and analyzing results obtained from statistics. Results indicated
that the unpaved area and high land erosion are identified as the most
effective factors, respectively. In contrast, runoff and surface geology are considered
as the lowest rate. Other factors reflect moderate effects. Since any
significant studies have not been done in this regard, the current research can
present a new method to scrutinize the empirical effects of these factors. It is
noteworthy to highlight that different methods are compared with each other
in order to scrutinize the amount of erodibility in most studies, but the
present study has analyzed the influential factors of the sub-methods of one
major method. This essay focuses on the affectability of each one of the nine
factors, independently. In conclusion, the outcomes of this research can contribute
to identify and determine suitable alternatives to stabilize sedimentary
basins and increase the life span of dams and watershed management projects
and also reduce the destructive effects of floods. Additionally, it contributes
civil projects in such lands.
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