Pemetaan Salinitas pada Sumur Bor di Kelurahan Belawan II Kecamatan Medan Belawan

Abstract

The activity of residents in the village of Belawan II in need of large amounts of water in general by making use of the well drill in order to fulfill the needs of water are necessary. Drill wells are the main source of water supply for the population living in rural and urban areas of Indonesia. The purpose of the research is the analysis of salinity water well drill, an analysis influence of the depth of the well against the intrusion of sea water and analytical overview of the distribution of salinity in the drill well. The research was conducted in the month of May-June 2013. The research was conducted in the village Belawan II , Sub District Medan Belawan, Province North Sumatra. This research uses the software ArcView GIS 3.3 to obtain a map of the spread of salinity. The results showed that the salinity of the water wells drilled in the Village of Belawan II varied. Number of wells drill included in the good classification (333mg / l) at 4%, is permitted (666-1333 mg / l) by 27%, doubtful at (1666-2000 mg / l) by 46% and dangerous (2333-3000mg / l ) at 24%. Types of fresh water by 4%, moderate by 27% and brackish water by 69%. Drill well at the depth of 65-100 meters included in the classification of dangerous 47 wells, dubious 36 wells, allowed as much as 2 wells and good there is no. Drill well at the depth of >100 meters included in the classification of dangerous there is no, dubious 18 wells, allowed 88 wells and good 7 wells. This matter show that water sumur bor already happening intrusion and having the quality of water for raw materials miscreated drinking water. The state of settlements, the extremely dirty and there are garbage around the house this can affect the condition the drill well water the population.