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All Journal Jurnal Agrista Jurnal Penelitian Pendidikan IPA (JPPIPA)
Dwi Nugroho Wibowo
Universitas Jenderal Soedirman
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Physics

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The Utilization of Aquatic Weeds as Biomonitoring Agent for Trophic Status of Water Reservoir Ecosystem Dwi Nugroho Wibowo; Agatha Sih Piranti
Jurnal Agrista Vol 11, No 1 (2007): Volume 11 Nomor 1 April 2007
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (733.887 KB)

Abstract

ABSTRACT. An ecological study of aquatic weed for biomonitoring trophic status of water reservoir system was conducted in Rawa Pening Water Reservoir, Ambarawa, Semarang Regency. This research was conducted from February to October 2006. Variables of study were taken from nine selected observation stations representing upstream, middle, and downstream both in wet season and dry season. The study was aimed to investigate the diversity of aquatic weed in Rawa Pening Water Reservoir at the three zones in both season in order to obtain bioindicator for trophic status of water reservoir ecosystem. The analysis on community structure of aquatic weed was carried out by describing data on the diversity of aquatic weed species. The similarity of aquatic weed characteristics among zones was analyzed on the basis of average similarity dendogram. The variation of water quality and aquatic weed characteristics among stations was analyzed using multivariate analysis based on the analysis of main component, while spatial distribution of aquatic weed was analyzed using correspondence factorial analysis. Based on the variation of characteristics of water quality, Rawa Pening Water Reservoir belongs to eutrophic status. Low diversity of aquatic weed in Rawa Pening Water Reservoir both in wet season and dry season (12 species) was observed. The dominant species in both season were Eichhornia crassipes and Salvinia natans. Other species found were Hydrilla verticillata, Pistia stratiotes, Chara sp., Nitella sp., Ipomoea aquatic, Cyperus cephalotes, C. pilosus, Alternanthera philoxeroides, Nymphoides indica, and Sacciolepis interrupta. Both in wet season and dry season, spatial distribution on the basis of aquatic macrophyte weed was evenly distributed and had grouping pattern of sufficienly high similarity ( 70%). The group tended to be dominated by E. crassipes and S. natans.
Analysis of Important Factors of Groundwater Availability in Narmada District, West Lombok Regency, West Nusa Tenggara Province Anita Dwi Indaryani; Dwi Nugroho Wibowo; Erwin Riyanto Ardli; Endang Hilmi; Muslihudin; Syamsul Hidayat; Nazario Gomes
Jurnal Penelitian Pendidikan IPA Vol 11 No 1 (2025): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i1.7031

Abstract

Groundwater utilization in Narmada Regency has increased significantly while its availability is decreasing. This requires management to maintain clean water supply. Research on variables that affect groundwater availability and interactions between them therefore needs to be carried out. Firstly, a Focused Group Discussion (FGD) was held to identify the variables considered important in groundwater management. Respondents then filled out a set of questionnaires expressing their perceptions about the importance of these variables. The variables were grouped into four dimensions namely Input, Output, Domestic Output and non-Domestic Output. Next, respondents' responses were analyzed using the MICMAC structural analysis tool to sort out variables regarding their influence and dependence as well as evaluating the interactions that occured between the variables.  The results showed that there are 7 key variables i.e. Central Government Regulations (PPP). Local Government Regulations (PPD), Rainfall (HUJ), Groundwater Basin (CAT), Forest (HUT), Climate (IK), Number of Population (JP) and 1 regulatory variable ie. Geological variable (GEO) in the groundwater availability system in Narmada District. Also, there exist structured and systematic interactions between dimensions in the system. The results of this study are useful as input in making appropriate regulations for sustainable groundwater in the study area.
Co-Authors Agatha Sih Piranti Anita Dwi Indaryani Endang Hilmi Erwin Riyanto Ardli Muslihudin Muslihudin Nazario Gomes Syamsul Hidayat