عوامل بالقوه ي آلايندگي منابع آب كارست در حوضه كارده (شمال شهرستان مشهد)

The Potential Factors of Karst Water Sources Pollution in Karde Basin (Koppet Dag Zone) "Mangement and Prtotection of Karst Water Sources"

Kardeh basin in Karst terrian situated in koppet dag zone. The lime and carbonate stones existing in karst forms have severely been broken up and there are crevices. As karst drainage system is highly sensitive to transference or arrival of any kind of pollutants, the existence of pollutants such as accumulation of garbage, animal excrements, the flow of setliements sewages to rivers, and trash accumulated by tourists can be potential pollutants for karst water sources. Despite the fact that karst water supplies are used in the northern hills of Mashhad, there have not been protective measures, and karst water sources lack management. It is, therefore; imperative to take protetive and managerial measure in order to control and safe guard water sources. This article is aimed at dealing with karst characteristics and kardeh geomorpholical situation in relation to drainage sensitivity, and pollutant factors which have largely been increased in recent years. These factors have been identified and classified in the region, and their concentration situation is drawn in a map, which can be of importande for executives and planners.