Art Original
Analisa Sebaran Air Tanah, Menggunakan Metode Hidrokimia dan Sistem Informasi Geografis (SIG), di Desa Labuhan Tangga Besar dan Sekitarnya, Kecamatan Bangko, Kabupaten Rokan Hilir, Provinsi Riau
Labuhan Tangga Besar Village and its Surroundings, Bangko District, Rokan Hilir District, Riau Province. This village only consists of 1 formation, namely the Old Surface Sediment Formation (Qp), which has acidic swamp and peat conditions. The purpose of this study was to determine the distribution and direction of groundwater surface flow, the feasibility of the physico-chemical quality of the groundwater, as well as the condition of the groundwater facies in the village of Labuhan Tangga Besar and its surroundings, Bangko District, Rokan Hilir Regency, Riau Province. The parameters tested were color, taste, odor, dissolved solids (TDS), electrical conductivity (DHL), pH and Fe. The research method used is a field survey method and laboratory analysis. Based on the research results, obtained 15 dug wells. The direction of groundwater flow flows from the Southwest, Northwest and Southeast to the East and Northeast. The color of groundwater in the study area is clear (20%), turbid (46%), brown (7%) and reddish brown (27%), the smell of groundwater is odorless (53%) and odorless (47%), the taste of groundwater is brackish (33%) and tasteless (67%), dissolved solids (TDS) 67 mg/l – 1,161 mg/l, electrical conductivity (DHL) 134 – 4,330 µS/cm, pH value 6.43 – 6 .83, and Fe value 0.3 – 3.81 mg/l. Analysis of groundwater facies using Kurlov diagrams, stiff diagrams and piper diagrams which show 3 types of groundwater facies in the study area, namely Cl+SO? Facies, Na(K) Cl(SO?) Facies, and Na(K) HCO? Facies. Based on the research results, there are 9 dug well stations, where the water meets quality standards based on Minister of Health Regulation No. 492 of 2010 and Minister of Health Regulation No. 32 of 2017 as drinking water or clean water.
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