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All Journal International Journal of Advances in Intelligent Informatics Journal of Geoscience, Engineering, Environment, and Technology Buletin Pembangunan Berkelanjutan

Dewandra Bagus Eka Putra

Universitas Islam Riau

Author-ID : 2389633

Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Physics Social Sciences

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Preliminary Analysis of Slope Stability in Kuok and Surrounding Areas Dewandra Bagus Eka Putra; Tiggi Choanji
Journal of Geoscience, Engineering, Environment, and Technology Vol. 1 No. 1 (2016): JGEET Vol 01 No 01 : December (2016)
Publisher : UIR PRESS

The level of slope influenced by the condition of the rocks beneath the surface. On high level of slopes, amount of surface runoff and water transport energy is also enlarged. This caused by greater gravity, in line with the surface tilt from the horizontal plane. In other words, topsoil eroded more and more. When the slope becomes twice as steep, then the amount of erosion per unit area be 2.0 - 2.5 times more. Kuok and surrounding area is the road access between the West Sumatra and Riau which plays an important role economies of both provinces. The purpose of this study is to map the locations that have fairly steep slopes and potential mode of landslides. Based on SRTM data obtained, the roads in Kuok area has a minimum elevation of + 33 m and a maximum + 217.329 m. Rugged road conditions with slope ranging from 24.08 ° to 44.68 ° causing this area having frequent landslides. The result of slope stability analysis in a slope near the Water Power Plant Koto Panjang, indicated that mode of active failure is toppling failure or rock fall and the potential zone of failure is in the center part of the slope.

Saltwater Intrusion Zone Mapping on Shallow Groundwater Aquifer in Selat Baru, Bengkalis Island, Indonesia Dewandra Bagus Eka Putra; Yuniarti Yuskar; Husnul Kausarian; Wan Zuhairi Wan Yaacob; Mohamad Sapari Dwi Hadian
Journal of Geoscience, Engineering, Environment, and Technology Vol. 4 No. 1 (2019): JGEET Vol 04 No 01 : March (2019)
Publisher : UIR PRESS

Saltwater intrusion becomes a common problem in coastal area. Northern coast of Bengkalis Island in Riau, Indonesia that contiguously to Malacca Strait is experiencing the problem particularly in Selat Baru area which considered as developing area and most of the people live close to the sea. Dug well is the main source of groundwater that had been used by the population in Selat Baru and as the increasing of land occupation, the demand of clean water is rising up followed by the number of dug well. A study of groundwater monitoring was conducted to identify the zone of saltwater intrusion. Field observation had done by measuring the water level and physical parameters of groundwater such as taste, pH, electrical conductivity (EC) and total dissolved solid (TDS) from 110 existing dug wells. Some conus feature had found from groundwater elevation map which indicated lower water level caused by excessive groundwater pumping. Generally, pH shows values from 6-8 that was still in range of water quality standard, but there are 20 wells (18%) that have pH below the water quality standard (slightly acidic water). Similar pattern had been observed from Electrical Conductivity (EC) and Total Dissolved Solid (TDS) map, higher value of EC and TDS was dominant in the northern part of study area and lower value in the south. Groundwater taste map also revealed the identical condition with EC and TDS map which dominated by brackish and saline water in the northern part. Therefore, the study area had been divided into two zones of groundwater saline water zone possibly caused by the saltwater intrusion in the northern part and freshwater zone from the center to the southern part.

Co-Authors Budi Prayitno Catur Cahyaningsih, Catur Gevisioner Gevisioner Husnul Kausarian Josaphat Tetuko Sri Sumantyo Mairizki, Fitri Mohamad Sapari Hadian Suryadi, Adi Tiggi Choanji Wan Zuhairi Wan Yaacob Yuniarti Yuskar Yuniarti Yuskar

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