Irrigation and Melioration


In connection with the growing demand for building materials in recent years, cases of uncontrolled mining of sand and gravel materials have increased in the Republic. This in turn had a negative impact on the morphology, hydrology and hydraulics of the water flow and turn led to a decrease in surface and subsurface zones, erosion of river banks, water intake regime in irrigation systems, disruption of work or destruction of transport, hydraulic and communication facilities. Problems were studied on the Chirchik River in natural conditions and using the Google Earth program. Observations found that uncontrolled mining of sand and gravel materials led to the erosion of the coast, as well as the threat of loss of stability of objects located in the riverbed or on the floodplain. For a more in-depth study of the quarries of sand and gravel materials that emerged due to mining using a digital image of the earth obtained from the Landsat 8 satellite using the Surfer 15 program, was created 2D and 3D topographic map of the quarry. A graph has been constructed of the dependence of the pit volume on the depth of development, from which it is easy to determine the total volume of the pit.


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