Application of Parametric-Based Framework for Regionalisation of Flow Duration Curves

Otache, Martins Yusuf; Tyabo, Muhammad Abdullahi; Animashaun, Iyanda Murtala; Ezekiel, Lydia Pam

doi:10.4236/gep.2016.45009

Cited by 5 publications

(2 citation statements)

References 7 publications

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“…These results are in agreement with those found by Silva et al (2019), Costa et al (2012 and Pessoa et al (2011), which demonstrated the efficiency of the cubic and exponential models in the adjustment with the curves of permanence in the watersheds of the Amazon. In contrast, studies by Otache et al (2016) and Shu & Ouarda (2012) obtained the best results for the exponential and logarithmic models. According to Silva et.…”

Section: Fdc Fitmentioning

confidence: 79%

Regionalization of flow duration curves in the Amazon with the definition of homogeneous regions via fuzzy C-means

Pessoa

Blanco

Gomes³

2021

An. Acad. Bras. Ciênc.

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Section: Fdc Fitmentioning

confidence: 79%

Regionalization of flow duration curves in the Amazon with the definition of homogeneous regions via fuzzy C-means

Pessoa

Blanco

Gomes³

2021

An. Acad. Bras. Ciênc.

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“…Rainy season (with precipitation varying from 100 mm in the north to 1300 mm in the south, Figure 2) commences in April, attaining its peak around September and ends in October. Dry season lasts between November and March (Otache et al, 2016). The main channel of the river crisscrossed three different agro-climatic zones: Sahel (semi-arid zone) in the northern part of Nigeria where arable crop and nomadic system of farming is dominant, the rainforest zone mainly dominated by unplanned/ unregulated urban settlement and farming, and the mangrove/delta region where oil exploration is taking place, before emptying into the Atlantic.…”

Section: Study Areamentioning

confidence: 99%

Environmental and spatial determinants of fish community structure in an Afro‐tropical river ecosystem

Ugbor

Omoigberale

Amoutchi

et al. 2023

Ecology of Freshwater Fish

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We investigated the relative influence of local environmental and spatial factors in structuring the community composition of fish at 15 sampling sites along the longitudinal gradient of the Lower Niger River Basin (LNRB) in dry and rainy seasons using distance‐based redundancy analysis and variation partitioning analysis. We collected a total of 3807 fish specimens representing 42 species. Our result indicated that the fish community composition differed between the upper and lower regions of the river. The communities in the upper region is influenced by high‐nutrient concentrations, while downstream sites were characterized by high concentrations of suspended solids. Variation partitioning revealed higher contributions of spatial than environmental predictors on fish community composition, with a higher total predicted variance in dry season. The variations in the community composition between upper and lower region may be attributable to the differences in the nature of anthropogenic activities within the regions, which influenced the local conditions differently. Differences in flow dynamics between upper and lower regions as attributable to black and white floods in the LNRB modify the connectivity between sites. Dispersal among sites may be more limited downstream than in the upper region, particularly in the dry season, because damming in the upper region also interrupts the natural flood regime such that there are low water levels in the lower region, which spatially isolate fish communities at certain sampling sites. The relatively higher total predicted variance during dry season may be attributable to the temporal differences in abiotic conditions between sites, which may have influenced site level community composition and abundance differently.

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Analysis of variations and trends of temperature over Niger central hydrological area, Nigeria, 1911–2015

Animashaun

Oguntunde

Olubanjo

et al. 2023

Physics and Chemistry of the Earth, Parts A/B/C

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Application of Parametric-Based Framework for Regionalisation of Flow Duration Curves

Cited by 5 publications

References 7 publications

Regionalization of flow duration curves in the Amazon with the definition of homogeneous regions via fuzzy C-means

Regionalization of flow duration curves in the Amazon with the definition of homogeneous regions via fuzzy C-means

Environmental and spatial determinants of fish community structure in an Afro‐tropical river ecosystem

Analysis of variations and trends of temperature over Niger central hydrological area, Nigeria, 1911–2015

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