Morphometry Assessment of Oba River Basin and Its Implications for Flood

Jesuleye, I; Okeke, Uche; Atijosan, Abimbola Oyewole; Badru, Rahmon Ariyo; Adewoyin, J. E.; Alaga, A

doi:10.9734/jgeesi/2016/30266

Cited by 6 publications

(6 citation statements)

References 17 publications

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“…It underscores the hydrological, climatic and geomorphological equilibrium [29]. In addition, drainage density according [30] is measured in km/km 2 , the author also explained drainage density explains the closeness of stream to each other for evaluation of the mean length of drainage channel.…”

Section: Data Requirement For Spatial Analysismentioning

confidence: 73%

Vulnerability Assessment and Household Preparedness Level to Flood in Ogunpa-Oni Sub River Basin

Balogun

Adamu

Alaga

et al. 2021

AJEE

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Flood is a natural event that cause varying degree of losses despite initiatives to mitigate its impact. As the drive to retore normalcy in flood riddle areas increases, concerns about the vulnerability of areas in relation to households’ responses to flood has emerged. This study therefore, identified areas vulnerable to flood; elicit households’ sociodemographic attributes and examine their level of preparedness to flood in Ogunpa and Oni River Basin. A GIS-based approach was adopted along with 121 well-structured questionnaires administered to the respondents. A multi-criteria analysis (that considers slope, rainfall, soil type, DEM and NDVI was adopted), descriptive statistic and binary logistic model was used to achieve the objectives. The results from the vulnerability map revealed varying vulnerability status across Ogunpa and Oni River Basin. In addition, the sociodemographic statistics revealed important variables that influences household decision to prepare for flood. It was also known that factors that drive households to prepare for flood vary across households in Ogunpa and Oni River Basin. The study recommends enlightenment campaign on proper refuse disposal, strengthening of environmental regulatory agency, adoption of participatory approach in the buildup of environmental policy and increasing the level of awareness on the need for insurance policy that covers household against disaster such as flood.

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Section: Data Requirement For Spatial Analysismentioning

confidence: 73%

Vulnerability Assessment and Household Preparedness Level to Flood in Ogunpa-Oni Sub River Basin

Balogun

Adamu

Alaga

et al. 2021

AJEE

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“…In retrospect, some datasets have been analyzed in Odo-Oba, Southwestern Nigeria in the last one decade. The studies include radiometric signatures analysis, morphometry assessment using geophraphic information system data, internal geometry assessment using electrical resistivity tomography technique, evaluation of heavy metals in soil samples, and water assessment of Odo-Oba, Nigeira [6] , [7] , [8] , [9] .…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

“…1 ). The basin is bounded with the coordinates of latitude 7° 28′ 25.9′′ to 8° 18′ 51.3′′ north and latitude 4° 8′ 44.3′′ to 4° 13′ 14.1′′ east respectively [7] . As reported by [8] that, “for several years, most of the materials being carried by the river several kilometers are deposited around Oba village along Oyo-Ogbomoso road probably because of the relatively planar surface of the area, this action has resulted to alluvial plain (quaternary sediments) which are likely to be made up of different materials”.…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Geoexploration of radioelement's datasets in a flood plain of crystalline bedrock

et al. 2017

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The data in this article contains statistical analysis of radioelement in Odo-Oba flood plain of crystalline bedrock, Southwestern Nigeria. The data were acquired along twenty-two traverses. The length of each traverse is a function of its accessibility in the study area. The traverses covered the area used for agricultural practices and the area where these farm products are being sold to either the retailers or the consumers. Descriptive and multivariate statistical analyses were used to explore the measured emitted gamma radiation in Odo-Oba flood plain. The dataset can provide insights into the risks involved in exposure to outdoor radiation in a commercial centre when the average outdoor gamma radiation levels are compared to the global threshold values from the regulatory bodies such as World Health Organization, National Research Council, United States Environmental Protection Agency, Federal Environmental Protection Agency, International Commission on Radiological Protection, the United Nations Scientific Committee on the Effects of Atomic Radiation, and Federal Radiation Protection Service among others.

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“…Kajian karakteristik morfometri dan banjir di Pulau Buru belum banyak diteliti. Hasil-hasil kajian menunjukkan bahwa informasi karakteristik morfometri DAS sangat penting guna memahami karakteristik hidrologis DAS [2,3] , karakteristik banjir [4,5] dan untuk monitoring dan perencanaan manajemen sumberdaya air [6,7] . Morfometrik atau karakteristik fisik DAS seperti luas DAS, panjang sungai utama, orde sungai, lebar sungai, kerapatan sungai dan kemiringan sungai sangat berpengaruh terhadap bentuk hidrograf banjir [8] .…”

Section: Pendahuluanunclassified

Karakteristik Morfometri Dan Hidrologi Daerah Aliran Sungai Way Apu Kabupaten Buru

et al. 2020

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ABSTRAKKarakteristik morfometri penting untuk memahami proses hidrologis pada suatu DAS. Tujuan penelitian ini (1) mengkaji karakteristik morfometri DAS Way Apu, (2) menganalisis debit banjir rencana dan hidrograf satuan untuk mendukung perencanaan pengembangan bangunan air di DAS Way Apu. Analisis data meliputi karakteristik lahan morfometri DAS, dan hidrologi DAS. Distribusi frekuensi hujan dihitung dengan metode Log-Pearson Type III, Gumbel, Normal, Log-Normal. Hujan dan debit rencana dihitung dengan kala ulang 2, 5, 10, 25, 50, dan 100 tahun untuk masing-masing metode. Debit banjir rencana dihitung dengan metode Rasional, sedangkan model unit hidrograf DAS Way Apu dihitung dengan metode Nakayasu. Hasil penelitian menunjukkan bahwa bentuk DAS kategori lonjong atau memanjang, dengan 4 orde sungai, pola aliran dendritik, dan kemiringan sungai kecil. Curah hujan rencana untuk periode ulang 2, 5, 10, 20, 25, 50 dan 100 tahun berkisar 37,59 – 185,14 mm (Log Pearson Type III), 41,32 – 180,28 mm (Gumbel), 47,68 – 139,98 mm (Normal), dan 36,82 – 203,66 mm (Log-Normal). Hasil uji Smornov-Kolmogorof menunjukkan bahwa metode Log-Pearson Type III, Gumbel, dan Log-Normal dapat digunakan untuk perhitungan debit banjir rencana. Data debit banjir rencana Gumbel dapat digunakan untuk umur bangunan air 25 tahun, sedangkan bila bangunan airnya dibangun untuk umur 100 tahun, Log-Normal lebih cocok. Berdasarkan Hidrograf Satuan Sintetik Nakayasu, kapasitas tampung DAS Way Apu adalah 21,37 m3/dtk, dan kondisi ini tidak mampu menampung debit banjir yang terjadi.Kaca Kunci: Karakteristik morfometri DAS, debit banjir rencana, DAS Way Apu

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Morphometry Assessment of Oba River Basin and Its Implications for Flood

Cited by 6 publications

References 17 publications

Vulnerability Assessment and Household Preparedness Level to Flood in Ogunpa-Oni Sub River Basin

Vulnerability Assessment and Household Preparedness Level to Flood in Ogunpa-Oni Sub River Basin

Geoexploration of radioelement's datasets in a flood plain of crystalline bedrock

Karakteristik Morfometri Dan Hidrologi Daerah Aliran Sungai Way Apu Kabupaten Buru

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