Physical and Chemical Properties of Groundwater in Banjararum Area and Its Vicinity, West Progo

Abstract

Groundwater in the Banjararum area is found in various rocks that build the West Progo Hills, including the Nanggulan and the Andesite Breccia Formations. Groundwater can be found in dug wells and springs. Field surveys show that the groundwater is generally clear, tasteless and odorless, except for the well at Ngipikrejo. Chemical test results from four samples showed that groundwater in limestone has Ca, Mg - HCO3 type, whereas in volcanic rocks of type Ca - HCO3 and Ca, Na - HCO3. Groundwater chemistry type is generated from the soil, mineral dissolution in sedimentary rocks and igneous rocks as well as the atmosphere through rainwater. The considerable content of NO3 in the Ngipikrejo area indicates pollution from human activities, plants or animal dung. In general, groundwater in the study area is suitable for use as clean water or drinking water, characterized by a measurable pH in the field of 6.6 - 7.2 and TDS 54 - 155 ppm. Nevertheless, laboratory test results show that groundwater samples are water-filled, with a hardness of 135,866 - 778,048 (moderately hard - very hard), so special treatment is required before drinking.

Geochemical of Karst Water in the Western part of Gunungkidul District Area

“…Groundwater emerges in several places as springs of reef limestone aquifers, supported by intergrain, fractures, and channels porosities. Groundwater and surface water are colourless (46 -350 TCU) and relatively clear (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19) with a pH of 6.8 -8.1 and TDS of 76 -308 ppm. Groundwater shows Ca -bicarbonate and Ca, Mgbicarbonate types, whereas dolines water has Ca, Mgbicarbonate types.…”

“…The stiff diagram can be useful to correlate groundwater quality horizontally in the aquifer and know the hydrochemical facies [12]. Therefore, the characteristic of groundwater facies is useful to understand the hydrogeological system [13].…”