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All Journal Media Komunikasi Geografi geoedusains: Jurnal Pendidikan Geografi
Evi Mivtahul Khoirullah, Evi Mivtahul
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Earth & Planetary Sciences Education Social Sciences

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The Calculation Of Ngancar Batuwarna Reservoir, Wonogiri, Central Java Ulfa, Azura; Suprayogi, Slamet; Khoirullah, Evi Mivtahul
Media Komunikasi Geografi Vol 18, No 2 (2017)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1121.528 KB) | DOI: 10.23887/mkg.v18i2.12620

Abstract

Evaluation of reservoir capacity is needed to find out how big the effective volume change of Ngancar Reservoir from the beginning of measurement until 2016. The purpose of this research is measuring volume of Ngancar Reservoir using bathymetry method with echosounder and calculating the remaining relative age of Ngancar Reservoir. Measurement topography of Ngancar Reservoir is done by bathymetry method of aquatic systematic random sampling method through certain path using echosounder. Analysis of reservoir capacity is done by calculating the volumes of Ngancar Reservoir and calculating the residual life of the reservoir relative. Fluctuation analysis of volume change was done by calculating the effective volume of reservoirs 1946-2016 and graphs. The calculation of the volume of the Ngancar Reservoir from the topographic map produces an effective volume value of 2016 is 1269905 m3 and the effective puddle area is 1393416 m2. An increase in sedimentation volume from 2011-2016 amounted to 296119.75 m3 with sedimentation rate was 59223.95 / year. With the assumption that the same landuse and sedimentation rate tend to be stable then the remaining age of Ngancar Reservoir is 21 years and 95 years old.
Kajian Hidrostratigrafi Bentanglahan Kepesisiran Tipologi Marine Deposition Coast Kecamatan Ngambur Provinsi Lampung khoirullah, evi mivtahul; Setyawan Purnama, I.g.L.; Widyastuti , Margaretha
geoedusains: Jurnal Pendidikan Geografi Vol. 2 No. 1 (2021)
Publisher : Pendidikan Geografi Fakultas Keguruan dan Ilmu Pendidikan Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geoedusains.v2i1.398

Abstract

This research was conducted on coastal area located in Ngambur Subdistrict, Pesisir Barat Regency, Lampung Province. Geomorphologically, typology of this coastal area formed of marine deposition coast. Which is consist of sandy beach (M1), beach ridge (M2), and fluviomarine (Fm). The purpose of this reasearch is to reconstruct and analyze charactreistic of hydrostratigraphy which is includes of soil stratigraphy system and properties, and physical properties of groundwater in the research area. Vertical distribution of soil resistivity obtained by measuring 24 of measuring points with depth of penetration’s up to 150 meters. Determination of measurement points are selected using purposive sampling method. Furthermore, the resistivity value of the measurement results is calculated using IP2Win software. Results of the calculation matched with soil resistivity tables. Results of the research show that vertically the type of aquifers identified are aquifer, aquitard, and aquifug. The constituent material is dominated by alluvium containing fresh groundwater which acts as an aquifer and sandstone materials which acts as aquitard. The electrical conductivity value (DHL) measured <1,200mmhos / cm which indicates that the groundwater in ths area is classified as fresh groundwater.
Co-Authors Azura Ulfa, Azura Rahma Kurnia Sri Utami Setyawan Purnama, I.g.L. Slamet Suprayogi Widyastuti , Margaretha Yarmaidi Yarmaidi