An Approach to Geotopes of Jajrud Catchment Basin from Meygun to Darbandsar

Development of urbanization imposed many mental and physical stresses on citizens. Air Pollution, noise pollution, Overcrowding, cars and the lack of green space caused Urbanites to need to have more leisure time. These causes resulted in interests of authorities to tourism. Tourism plays an important role in both Increasing revenues and employment and cultural and social aspects. Geotopes and geological phenomenon including caves, canyons, valleys, fossil sites, beaches etc., as a geological heritage, can be examined as potential geosites in developing geotourism and establishing geoparks. The studied area has various Climatic and geomorphological heritage including glacial cirques, terrace, wandering rocks, canyons and cliffs, caves and springs reflecting the ancient climates. Hence, it can be introduced as a platform for more geographical research as a geosite. key words: Geotope, Geosite, Geotourism, Geopark.

key words: Geotope, Geosite, Geotourism, Geopark.introDuCtion Tourism is the main factor for sustainable development in the economic, social, cultural and environmental levels (Papoli Yazdi & Saqaei, 2006).Recently, tourism industry has found a wide approach to ecotourism.By its inherent objectives, that is environment protection, commitment to local communities and respect for cultural characteristics of the host community, Ecotourism is a plan option with most consistency with the concept of sustainable development (Ghazi & Ghadiri, 2011).
Iran is considerably capable of tourism development.In terms of latitude and climate variability, there are various geotopes under Natural conditions of Iran which can play as an important role in tourist attraction and tourism development (Hamedi & Rezvani, 2012).
Geotourism, as an interdisciplinary subject, deals with all tourism infrastructures including management, accommodation and tours.Unlike ecotourism which deals with animate attractions, geotourism generally addresses inanimate nature attractions (Nekoui Sadri, 2009).
In the studied area, located in southern Alborz Mountains, the climate is favourable for attracting tourists.The mountainous landscape of the region and the Jajrood River, Shemshak and Dizin ski resort and Hamloon Cave can be a factor in attracting tourists to the area.Besides these factors, the existence of climatic and geomorphological heritage is also suitable for studies of geologists and geographers.

Problem statement
Geotourism is a branch of tourism as a new term recently used in tourism campaign of countries.Wherever one goes is on the earth, every part of the earth has its geological unique attractions, referring to the tourism based on geologic resources (Zandi, 2010).
Geotopes or geological phenomena are effective factors on Geotourism development and establishment of geoparks (Wikipedia).These areas, mostly interested by geotourists, are scientifically important; so that, ecologists and those interested in natural history are attracted to geotopes (Nojavan, et al., 2009).
The studied area has many different geotopic areas.Glacier cirques, moraines, river terraces and fossil straw indicate climatic variations of different geological periods.
Glacial cirques are of great importance in environmental and paleoclimatic studies, because the height of the outlet opening of cirques represents an annual temperature of zero degrees.With respect to the above, it can be concluded that glacial cirques, wandering rocks and morins created a situation where the environment can be considered as a paleo climate geotope in paleontology studies.Lack of scientific resources in relation to this phenomenon is a critical problem in planning and development in the tourism sector (Nojavan, et al., 2009).Despite the various tourist attractions and high capability to attract tourists, there is no study and planning for using these areas and providing facilities for tourism development can be important from different aspects.

the importance and necessity of research
Geotourism is a nature-related tourism dealing with introducing the geology phenomena to tourists.Audience of geotourism are not only experts, but also ordinary tourists interested in the nature (Abedi, 2012).
By diverse geology, climate, geologic features, there are various geotopes such as caves, beaches, and kalut in Iran, which can be used as geological heritage in the form of potential geosites following provision of tourism infrastructures as a tool to work towards the establishment of geoparks and geotourism development (Wikipedia).
Due to the high altitude of the region, the snow remains longer on slopes.Mountain glaciers in the form of snow filed maintain snow until midsummer.Hence, it can play a critical role in providing fresh water.
The studied area is capable of tourist activities; it also can be used as a Laboratory for studies of geology and geomorphology students.

hypotheses
It seems that the studied area is highly capable of tourist attraction and tourism and geotourism development in terms of ecology and geomorphology as well as favourable climatic conditions.

literature review Definitions
Geotourism is one of the newest approaches to recognize geology and identify natural capital of any area using Earth Sciences, geomorphology, geology and other natural sciences (Maleki Orsi & Najaf Zadeh, 2012).
Geotope refers to the area including natural heritage which reflects the history and development of the region (Nojavan, et al., 2009).
Geosite refers to a place with a rare and valuable geological or geomorphological phenomenon.These sites should be scientifically and aesthetically valuable and the possibility of visiting should be available publicly (Zandi, 2010).
Geopark refers to lands with unique geological phenomena and evolutionary history of geology.In fact, "geopark" is an area where geological heritage are well and sustainably conserved and managed.In other words, geopark is a territory of one important site, or more, in scientific (not just geological, but also archaeological, ecological or cultural) terms (Salimian, 2007).

Background
Geotourism is a new term in tourism, introduced for the first time in Iran by Nabavi (1999).

the studied Area
The Studied Area is a part of Central Alborz in 51°35' and 51°25' east longitude and 36°5' and 35°55' north latitude located in the north of Tehran (Figure 1).The area is limited from north to koloon Bastak Mountain (4124 meters) and khortunak The climate of this region can be used to explain the causes of ancient glacial conditions.Therefore, evaluation of the glacial forms can be conducted by analysis of climatic elements.
In glacial periods (initial Quaternary), the studied area was also affected by ice conditions.Glacial conditions are more or less similar to the erosion of the southern slopes of Alborz, which can be verified through geomorphological evidence.In glacial periods, morphology of the area formed under climate and local topography at different levels under influence of dominant erosion processes such as glacial erosion.Following climatic conditions and warming, the upper limit of erosion domains was mostly Ascending.Due to the reduced height of the mountains, glacial erosion was substituted by other morphoclimatic conditions.This has happened several times intermittently in this area.
To identify the effects of glacial erosion, studies have been carried out on 1:50000 and 1:250000 topographic maps and field studies.Existence of cirques and glacial valleys with glacial deposits in the northern part of the area indicate glacial conditions (Figure 2,3).Sometimes there are big rocks on the riverbed which do not appear to have the ability to move by water Due to the Height, amount and type of precipitation is different from other regions.In the north, precipitation is mostly snow which remains on foothills for 9 months.After the end of the cold season, snow starts to melt from low to high amplitude (Figure 4) and melts completely by August.Some of the water from melting snow penetrates into the foothill as underground storage.Some others flow on the slopes and then flow into the hydrographic network.
However, other parts of the mountain have been directly affected by streams during the cold season.Simultaneous to gradual melting of snow and penetrating into the ground, the cold allows its re-freezing in rock gaps and thin surface layers (Figure 5).Mechanical weathering is the other simultaneous factor to deform heights.
Mountains are west-east following the general trend of Alborz.Entry into the area starts from Meygoon in the southeastern and continues to Dizin at an altitude of 4100 meters in the North West.Slope decreases from the North West to South East.In the first stage, orogenic movements formed current Alborz (Figure 6).Hamloon Strait is located between Geirud and Meygoon, 35°59' latitude and 51°28' longitude at an altitude of 2311 meters.In this strait, there are remains of a cave called as Asbool by inhabitants.The valley is about 4 km in length and 50 meters in width.There are many fountains in the area (Figure 7).
Hamloon Mountains are made of Ruteh limestone in the lower parts; the thin limestone sediments and basic chromium are seen in west and east sides of the mountain.Hamloon cave is the result of dissolved Ruteh limestone in water penetrating the higher levels (Mehrpouya, 2000).
In different seasons even in winter, snow and ice-covered rock walls attract rock climbing and ice climbing sports enthusiasts to the region, which is the other factor to attract tourism.
Due to the weather (cold to temperate), there are Astragalus, Artemisia, Allium, Blackberry, sumac, Rosa canina, Alhagi, Rheum, and Hypericum perforatum in pastures of the area.At heights of Meygun, antelope herds can be seen in the pastures (figure 8).
Because of sandy and clay soils with good drainage, and abundant springs as well as Geirud and Shemshak rivers, crops and gardens can be seen in some places.The crops include wheat, alfalfa, and vegetables.Fruit tree in most valleys include cherry, fig, strawberry, apple, apricot, pomegranate and Greengage.
In some tourist spots, there are species such as Tabriz cedar, Spruce, Willow, ailanthus, acacia and sycamore that are partly grown by man (Figure 9).There are 13 springs in the studied area, of which 7 springs are located in the eastern north, 4 springs in the Quaternary sediments and 3 springs in Shemshak sediments; these springs indicate Permeability of the rocks.There is one spring in Bare Char Mountains in the west and three parallel springs in the foothills of Abnik Mountain in eastern north Meygun which is close to basin outlet (Figure 10).There is a bitter-water spring in the north Shemshak; the bitter taste is due to minerals in the rocks.
In the cold season, which begins in late November, precipitation is often in the form of snow.This snow accumulates and sometimes remains until late June.On the shallow valleys, sometimes snow accumulation covers the valley with snows from avalanche.The river continues to flow at the surface and creates a cave under snow accumulations, which is a beautiful phenomenon (Figure 11)

ConClusions
Because of its favourable climatic conditions and the presence of geomorphological phenomena such as glacial cirques, wandering rocks, waterfalls, and numerous fountains can be a good platform for further research and the introduction of the area as Jajrud basin geopark.Evidence of glacier indicates glacier period in this region; therefore, this region can be called a paleoclimatic geosite.Given the extent of constructions, it can be predicted that the area will become one of Tehran's major tourist hub in the future.Existence of favourable weather and ski resorts of Dizin and Shemshak attract many tourists to the area.Therefore, a proper policy can make the region one of the main tourist hub of Tehran.
fig. 1: Geographic location of the studied area