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Boshehr is a coastal city located along the warm waters of persian gulf. It is limited to zagros mountains persian gulf, hableh river and Tangestan town from north, south, west and east, respectively. The study area is in between sea and land areas. Such especial situations make the formation of specific land forms in coastal regulation zone (CRZ). Howevre, land from studies, especially land forms in CRZ (land between low water line and 500 meters from high water line) are well sensed. Therefore, such sensetive areas should be more considered and more efforts should be made to have better knowledge about them. This would enable a better planning and management of industrial, commercial,‌ residential, environmetal and tourism problems of these areas. for better analysis and getting best knowledge for mapping land forms of this area, remote sensing, GIS and GPS technologies have been used. In this research, geology soils, climate and hydrology of the area were first studied. then, the charachteristics of the area, CRZ definition, land forms classificahion and their precise definition and also collection of tide statistics were made. First, remote sensing, preprocessing of the data was made and then, using digital and visual interpretation techniques, different land forms were identified. regulation zone was drown. Based on ground truth data comparison, the final land from map within the CRZ was generated. the CRZ land from map showed thah the coatal areas of Boshehr are plagic in type and their formation is mainly due to land erosion factors than sea erosion. Also in this area, the rules of crz are not observed and must be seriously considered. Then, using extracted tidal and shore lines from satellite data, the coastal

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This study investigated the relationship between clay minerals and different soil moisture regimes in gypsiferous soils of Fars Province in southern Iran. The overall climate of the Province is arid and semi-arid and, under this condition, parent material is the most important factor affecting clay minerals distribution. Beside this factor, climate conditions have determining role too. Palygorskite, smectite, chlorite, illite, and kaolinite were identified as the main clay minerals in gypsiferous soils, using XRD, TEM and SEM analyses. Chlorite and illite were inherited largely from parent rocks and their abundance in soils with different moisture regimes was generally uniform. The presence of gypsum and saline and alkaline ground water in some pedons has favoured the neoformation of palygorskite from soil solution. Palygorskite shows an increasing trend with depth that may be related to its authigenic formation in the presence of gypsum. The correlation between palygorskite percentage and gypsum content was estimated (R²= 0.56). The highest amount of palygorskite was observed in soils with aridic moisture regimes, and its lowest amount was estimated in soils with xeric moisture regimes. Notably, with increasing moisture, the length of palygorskite fibber decreased. High soil moisture and rainfall and low evaporation are reasons for instability of palygorskite relative to smectite in xeric moisture regime. Large amounts of well-bundled and elongated palygorskite in soils of piedmont plain are related to their authigenic formation; while presence of slight amounts of short palygorskite fibres in lowlands suggest their transformation to smectite. Results of soil and rock samples analyses showed that some palygorskite in all moisture regimes originated from parent materials. Also, results indicated that the smectite/(illite+chlorite) ratio increased with increase in moisture and the largest value (equal to 2.12) was observed in soils with xeric moisture regime.