Vol. 6 No. 2 (2021): Environmental Risks and Resources Management
Published:
09/11/2021
Articles
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Assessment of Physicochemical Parameters and Phytoplankton of Eme River, Umuahia, Southeast Nigeria
Emeka Donald Anyanwu Department of Zoology and Environmental Biology, Michael Okpara University of Agriculture, Umudike, Nigeria Nigeria , Onyinyechi Gladys Adetunji Department of Zoology and Environmental Biology, Michael Okpara University of Agriculture, Umudike, Nigeria Nigeria , Solomon Nnanna Umeham Department of Animal and Environmental Biology, Abia State University, Uturu, Nigeria NigeriaAquatic ecosystems respond differently to diverse anthropogenic activities in their watersheds. Phytoplankton is sensitive to their environment and is used to monitor anthropogenic impacts. A study was carried out in a South-eastern Nigerian River between December 2017 and November 2018 in 6 stations; to assess the phytoplankton community, water quality, and anthropogenic impacts. Sand mining was a major activity in the river among others. The phytoplankton was sampled with the filtration method while water was collected and analyzed using standard methods. A total of 36 phytoplankton species were recorded with Chlorophyceae being the most abundant group. The most abundant species - Melosira granulata is a pollution indicator. The water quality and phytoplankton structure showed that the water was tending towards eutrophication. This is attributed to the observed anthropogenic activities and cumulative impacts of all the activities in the watershed. The impact of sand mining activities was observed more in the downstream stations (4 – 6) while perturbation from swimming children and related activities was observed in station 1. The community structure reflected the impacts of the activities while CCA showed the major water quality parameters that influenced the phytoplankton community structure.Pages: 1-12Views: - Downloads: -Diversity of Contaminants Fungi in Coffee Beans Stored Using Polystyrene and Gunny Sacks in South OKU Regency (Indonesia)
Deli Lilia Sriwijaya University Indonesia , Nurhayati Damiri Sriwijaya University , Mulawarman MulawarmanRobusta coffee is a coffee type found in South OKU Regency in Indonesia, and its storage process is highly susceptible to the growth of various fungal species, including fungi that produce Ochratoxin A (OTA). Therefore, this study aims to examine the fungal contamination contained in storage using polystyrene and gunny sacks for 20 and 30 days. Data were obtained from surveys, interviews, and samples from 30 farmers which stored coffee beans using polystyrene and gunny sacks in May-July 2020. The results showed that the moisture content was higher in storage using gunny sacks than in polystyrene sacks, at 16.94 ± 0.878 % and 15.99 ± 1.33%, respectively. Furthermore, 16 fungal species were present in gunny sack storage, while 14 fungal species were observed in polystyrene sacks. The percentage of OTA-producing fungi A.niger and A.ochraceus in the two stores yielded 100% and 63.3%, respectivelyPages: 13-19Views: - Downloads: -Water-Trap Series and City Pond to Control The Destructive Power of Runoff Water from Mbay Hills
Susilawati Susilawati Universitas 17 Agustus 1945 Semarang Indonesia , Pipit Skriptiana , Hartono HartonoWeworuwet Hill, which is part of the Mbay hillside in Flores – NTT has sparse vegetation, only a stretch of grass that covers it, and is dry in the dry season like a barren teletabic hillside. This has the potential for surface water runoff, which has high destructive power, especially in the lowlands of Mbay City. To overcome this problem, a study to control the destructive force of water runoff was carried out by applying a water-trap series system, so that the potential for the destructive power of water can be reduced. Tertiary, secondary and primary runoff analysis studies are carried out to determine the location of the required water-traps. This study was conducted using a geographic information system-based program. Furthermore, the hydrological analysis of the area is carried out to determine which flood discharge can be controlled, and the volume of water that can be used for greening hills so that it can reduce the potential for damage to water runoff. The remaining water discharge in the downstream will be accommodated in the city pond, which functions as water conservation infrastructure. Finally, by applying a series of water traps on the tertiary, secondary and primary runoff from the Mbay hilly area, the destructive power of the runoff can be controlled, so that it does not impact and burden the residential plains of the town of Mbay.Pages: 20-28Views: - Downloads: -Participation of Forest Encroachers in Participatory Ecosystem Restoration Program in Dangku Wildlife Reserve, Musi Banyuasin
Indra Purnama Bahri Sriwijaya University Indonesia , Sriati Sriati Sriwijaya University Indonesia , Sarno Sarno Sriwijaya University IndonesiaConservation forest areas in Indonesia cannot be separated from threats and damage. The amount of forest area in Indonesia that continues to decrease is the reason for the importance of resolving the problems that exist in Indonesia's forest areas. One of the conservation areas that is facing serious threat is SM Dangku in Musi Banyuasin Regency. Land conversion and forest encroachment are become serious problems that have not been resolved properly. The participatory ecosystem restoration program at Dangku Wildlife Reserve is expected to be one of the right steps to restore the degraded conservation forest area. The positive impacts that came from the implementation of this program are the reduction in the number of new land clearing by the community, the increased willingness of the community to plant trees on farming land, and the decrease in the number of encroacher living in the area. In order to determine the factors that influence the success of the program, a research on the perception and participation of the forest encroacher in supporting the participatory ecosystem restoration program in Dangku Wildlife Reserve was carried out. The research was conducted using a survey method with a qualitative approach. The results showed that the participation of the forest encroacher in the participatory ecosystem restoration program was moderate, although the level of perception of the forest encroacher towards the program was quite good. One of the factors that influence this condition is that the benefits derived from the program are not in line with the expectations and needs of the encroaching communities.Pages: 29-35Views: - Downloads: -Evaluation of Groundwater Potential Zone Using Remote Sensing and Geographical Information System: in Kaffa Zone, South Western Ethiopia
Azarias Ayele Woldegebriel Bonga University, Bonga Ethiopia Ethiopia , Temesgen Abeto Amibo Jimma University, Jimma Institute of Technology, School of Chemical Engineering Ethiopia , Abreham Bekele Bayu School of Chemical Engineering, Jimma Univesity, Jimma Ethiopia EthiopiaThis study focused on delineating the groundwater potential and recharge area for Kaffa Zone by the method of remote sensing and ArcGIS 10.4 software analysis techniques. There are six main influencing factors (rainfall, slope, land use/cover, lineaments, drainage density, and Lithology) selected for groundwater recharge zone mapping. The thematic maps were scanned, geo-referenced, and classified as suitable for groundwater using ArcGIS 10.4. The methods to assess the potential zone were using weight overlay analysis and hierarchy of analytical process algorithm. The result obtained the potential of ground water were discussed recharge zones into four major categories: very good, good, and moderate and low. This can help for better planning and management the potential resource of groundwater. The results analyzed the groundwater potential that were subdivided in to low, moderate, high, and very high groundwater potentials areas that cover 1664.1,7682.9, 958.27, and 192.78 km2 respectively. The prediction accuracy was checked based on the borehole yield observed and predicted data of respective locations within the selected area. The prediction accuracy obtained (68.42%) reflects that the present study's method was produced significantly reliable and precise results.Pages: 36-52Views: - Downloads: -Enhancement The Growth of Snakehead (Channa striata) With Addition of Dragon Fruit Peel Flour to the Diet
Rakhmawati Rakhmawati Lampung State Polytechnic Indonesia , Tulas Aprilia Lampung State Polytechnic Indonesia , Agung Kurniawan Lampung State Polytechnic IndonesiaSnakehead (Channa striata) is a fish that grows relatively slowly, but is a typical Sumatran fish with high albumin content and economic value. This makes this fish a very prospect to be developed. Meanwhile, dragon fruit peel is one of the wastes that can be used for diet raw materials and contains vitamins and minerals that have the potential to be useful for increasing growth in fish. This study aims to determine the growth performance of snakehead fed by adding dragon fruit peel flour. This study used test animals, namely snakehead fish juvenile with size of 1.06 ± 0.02 g/fish. Experiment of fish reared in aquarium measuring of 35 x 45 x 90 cm, filled with water as high as 15 cm without aeration. The experiment diets consisted of 5 types, namely feed added with 0% dragon fruit flour (control); 0.5; 1.0; 1.5 and 2.0% of feed. Each treatment was repeated three times. Snakehead was reared for 60 days and fed three times a day on an ad satiation basis. The parameters observed in this study were the survival rate and growth performance of snakehead fish. The results showed that the survival rate between treatments was not significantly different, namely in the range of 97.76 - 100%. Meanwhile, the specific growth rate and feed efficiency of snakehead which added 2% to the diets were the highest, namely 8.66 ± 0.04% and 67.83 ± 2.31%. The conclusion of this study was the addition of dragon fruit peel flour at 2% enhanced the growth performance of snakehead.
Pages: 53-58Views: - Downloads: -Distribution of Flood Risk Area in Bodri Watershed of Kendal Regency
Husna Fauzia Dinas Pekerjaan Umum Sumber Daya Air dan Penataan Ruang Provinsi Jawa Tengah Indonesia , Eka Cahyaningsih Dinas Pekerjaan Umum Sumber Daya Air dan Penataan Ruang Provinsi Jawa Tengah Indonesia , Hery Nugroho Hariyanto Dinas Pekerjaan Umum Sumber Daya Air dan Penataan Ruang Provinsi Jawa Tengah Indonesia , Satya Budi Nugraha Universitas Negeri Semarang IndonesiaFlooding is a catastrophic phenomenon that can occur due to various factors, such as uncontrolled land-use changes, climate change, and weather anomalies, and drainage infrastructure damage. The Bodri watershed in Kendal Regency is one of the watersheds in Central Java, which is categorized as critical based on Decree No. 328/Menhut-II/2009. Some of the problems in the Bodri watershed include land use that is not suitable for its designation, flooding, erosion, and landslides. This study aims to conduct spatial modeling to create flood hazard maps and flood risk level maps in the Bodri watershed. The method used is hydrograph analysis, flood modeling, analysis of potential flood hazards, and analysis of flood risk levels. Analysis of the potential for flood hazards from the spatial modeling inundation map with the input of the flood peak return period of 2 years (Q2), 5 years (Q5), and 50 years (Q50). Vulnerability analysis based on land use maps of flood hazard areas. The distribution of flood-prone areas in the Bodri watershed is in Pidodo Kulon Village, Pidodo Wetan Village, and Bangunsari Village.Pages: 59-69Views: - Downloads: -The Meaning of Water Environment for Stilt Houses on the Musi Riverbanks, Palembang
Ari Siswanto sriwijaya University Indonesia , Ira Kusumawaty Poltekkes Kemenkes Palembang IndonesiaWater functions are very diverse for humans for daily needs such as drinking water, bathing, agriculture, development, aesthetics and lowering temperatures. Palembang is a lowland area dominated by wetlands, tidal swamps and rivers. The types of houses on stilts on the banks of the Musi river are limas, gudang and Chinese stilt houses which are always associated with the water environment. The construction of roads replacing the role of rivers has realized that water environment has an important meaning for the house on stilts. The research objective was to explore the meaning of the water environment from various aspects for residents, stilt houses and their environment. The case study research method, taking field data, namely observation, photos, measurements and interviews with participants who are owners, residents and community leaders. Data and findings were analyzed and juxtaposed with images in the field. The road construction has eliminated part of the function of the river and influenced the change in orientation of the house on stilts. In conclusion, respect for water environment including rivers has decreased, causing the quality of the river to decline, and the house on stilts cannot take advantage of the existence of water environment optimally.
Pages: 70-77Views: - Downloads: -Make a Submission
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