The city Jalajel in Sudair on the highway old which connects the city of Riyadh Qassim region, and infringement of Riyadh city about 170 km north, passing near the highway that connects the city of Riyadh Qassim region, have reached this way compass private length of 12 km approximately.
And includes the study of geological structure of the city Jalajel and infrastructure terrain of mountains and lowlands, valleys and other natural phenomena leading to the surface.
Geological structure consists of area Jalajel of several types of rocks and sediments along sandy Alguetaouat and clay and loam covering some places and that Ersbtha wind erosion and water over time.
Jalajel lies to the east of the series collarette, a low-rise area, with an average height of about 780 meters and can be as high as some mountain heights in the region to more than 800 meters. Penetrate and hurt in Jalajel number of valleys and large and small coral island Ksaib, Peace Valley and Palm Valley and Wadi cluster, and the Samaritan Valley, and Shoaib Alqaar, and Shoaib Algariv. This along with the valleys and waterways other short.
The city Jalajel in Najd region where there is arid desert climate, they are located in the region of low-rise far from influences marine, and rarely by natural vegetation, and as a result after the region influences marine and lack of vegetation, it is famous for low rainfall and scarcity, and high temperature and drought atmosphere during the day where the fall high amount of solar radiation on the area of Cloud-free skies and lack of vegetation, which helps to lower the temperature and increase the percentage of moisture in the air. The Jalajel infected by drought and water depletion and Gore wells as a result of the lack of rain and I have said for a long period of time of up to several years.
Area Jalajel devoid of lake water bodies, as they lack running water like rivers and less rain and where there are two sources of water: two nearby surface water and deep groundwater.
Held in Jalajel dams and barriers on the valleys of the book flood water and reduce the threat to life and property, was held in Jalajel old number of barriers and embankments dirt and also built terraces of stones on the valleys to provide water and reduce the risk of floods. At present constructed dam Jalajel on the main valleys.
The Jalajel of the oldest cities in Sudair, and there are a number of old buildings still standing so far and need further study to determine its history, and also need to be protected so as not getting destroyed and could be a milestone of monuments in Jalajel. Among the most important old buildings now in Jalajel fences (internal wall and the outer wall), and the Palace of Sweden Ben Ali and palaces neighboring, and Ahoith Lower (Hoith Jadaan), and the observatory and the house of writer Sheikh Othman ibn Bishr (Author Date find), and the house of Sheikh Abdullah Anqari and other historic buildings task threatened with extinction.
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KSA