To provide a suitable classification of the quaternary deposition for flood spreading systems in Iran

Aquifer have been depleted in arid and semiarid areas due to continuity of anomalous exploitation of underground water resources compared to natural water recharge and thus it has been deluded that such areas were unproductive and under desert climate. while high permeability, high water storage capacity in coarse deposits and natural capability of flood ·· streams in fecundating these areas are among the issues the manifestation of which are nowadays becoming apparent in new and efficient debate of floodwater spreading over . aquifer. So that in the case of investment in national level and via applying exploitation methods of floods through controlling them, the depleted underground reservoirs are filled ~ g and the possibility of relatively stable water supply applying simple methods become feasible 5 in addition to the reclamation of arid and apparently desert areas in the form of reclamation and development of forests, rangelands and rehabilitation of environment. Floodwater spreading over aquifer is a combined optimal management of natural resources and porous layers of underground reservoirs which the water storage capacity stably ii and exploitation of then are feasible through digging well (extracting water) and/or through discharging by Qantas and springs. - Water storage in aquifers is easily applicable by artificial water recharge applying floodwater spreading over the area of debris cones and coarse-grained plains. The most substantial phase in planning for establishing floodwater spreading systems over debris cones and coarse-grained plains is to identify the potential of suitable soil and water resources in accordance with the aims of the system. The review and study of site selection for the areas suitable for floodwater spreading were planned and implemented. T Based on the results of this research about 4517993117 hectares of 51800000 hectares quaterner deposits of the country namely about 87% is considered as quaterner deposits with non-agricultural use. The areas of quaterner deposits completely suitable, suitable and rather · suitable which can be used for establishing floodwater spreading systems are respectively 14185999, 6272201 and 11030074 hectares. Namely, the proportion of completely suitable and rather suitable barren quaterner deposits and those with rangland use are respectively 27, 12 and 21 percent. According to the results gained, sub-basin number 2-4-3 from karoon basin with 557936 hectares suitable quaterner deposit without water confinement has the most potential and the sub-basin number i 3-4-8 from Kal Shoor basin with 447 hectares suitable quaterner deposit without water confinement has the least porential for establishing floodwater spreading systems. Further more, in the case of not having any restiviction in supplying needed floodwater. there are 2045 8200 hectares of completely suitable and suitable quaterner deposits in the country which if can be used for establishing floodwater spreading systems.