Spatial Analysis and Modelling of Wind Farm Site Suitability in Nasarawa State, North-Central Nigeria

Morphology in South OKU District is the potential of a micro hydropower plant (MHPP) as an alternative power source. This potential has not been fully utilized, although many un-electrified villages are in several remote areas. Identification planning for MHPP is one of the most critical planning tasks and requires excellent multi-criteria spatial analysis. GIS and multi-criteria analysis have played an essential role in analyzing suitable locations for MHPP development. GIS and multi-criteria spatial analysis consist of detailed investigations of ongoing sites and suitability for specific planning. This research aims to overview GIS multi-criteria spatial analysis for MHPP site suitability based on electricity South OKU demands. The most critical data and criteria to decide the best site suitability are un-electrified villages, rivers, land use, slope, landslide vulnerability, and elevation. All of the data were generated into the raster data format. Quantitative modeling used AHP as a multi-criteria analysis method, and a weighted score is determined by considering the comparison of each criterion. Finally, the criterion layer was calculated by open-source QGIS to create a site suitability map. The field study verified the resulting map, and there is a match between the preferred locations and the field survey. The research results preferred Sungai Are, Sindang Danau, and Kisam Tinggi Sub-district as the best suitability for MHPP development.

Download Full-text

Spatial Analysis of Water Quality in Parts of Rivers Niger and Kaduna Catchments, North Central, Nigeria

Asian Review of Environmental and Earth Sciences ◽

10.20448/journal.506.2020.71.72.78 ◽

2020 ◽

Vol 7 (1) ◽

pp. 72-78

Author(s):

IDRIS Aliyu Ja’agi ◽

Yahaya T. I. ◽

Abubakar A. S. ◽

Jigam A. A

Keyword(s):

Water Quality ◽

Spatial Analysis ◽

North Central

Download Full-text

The effect of wind direction shear on turbine performance in a wind farm in central Iowa

Wind Energy Science ◽

10.5194/wes-5-125-2020 ◽

2020 ◽

Vol 5 (1) ◽

pp. 125-139 ◽

Cited By ~ 7

Author(s):

Miguel Sanchez Gomez ◽

Julie K. Lundquist

Keyword(s):

Wind Turbine ◽

Wind Direction ◽

Wind Farm ◽

Atmospheric Conditions ◽

North Central ◽

Wind Speeds ◽

Turbine Performance ◽

Time Period ◽

Wind Direction Shear ◽

A Site

Abstract. Numerous studies have shown that atmospheric conditions affect wind turbine performance; however, some findings have exposed conflicting results for different locations and diverse analysis methodologies. In this study, we explore how the change in wind direction with height (direction wind shear), a site-differing factor between conflicting studies, and speed shear affect wind turbine performance. We utilized lidar and turbine data collected from the 2013 Crop Wind Energy eXperiment (CWEX) project between June and September in a wind farm in north-central Iowa. Wind direction and speed shear were found to follow a diurnal cycle; however, they evolved differently with increasing wind speeds. Using a combination of speed and direction shear values, we found large direction and small speed shear to result in underperformance. We further analyzed the effects of wind veering on turbine performance for specific values of speed shear and found detrimental conditions on the order of 10 % for wind speed regimes predominantly located in the middle of the power curve. Focusing on a time period of ramping electricity demand (06:00–09:00 LT – local time) exposed the fact that large direction shear occurred during this time and undermined turbine performance by more than 10 %. A predominance of clockwise direction shear (wind veering) cases compared to counterclockwise (wind backing) was also observed throughout the campaign. Moreover, large veering was found to have greater detrimental effects on turbine performance compared to small backing values. This study shows that changes in wind direction with height should be considered when analyzing turbine performance.

Download Full-text

Stromatoporoids from the Famennian (Devonian) Wabamun Formation, Normandville oilfield, north–central Alberta, Canada

Journal of Paleontology ◽

10.1017/s0022336000018321 ◽

1988 ◽

Vol 62 (03) ◽

pp. 411-419 ◽

Cited By ~ 5

Author(s):

Colin W. Stearn

Keyword(s):

Patch Reef ◽

Abundant Species ◽

The Other ◽

North Central ◽

Biotic Crisis

Stromatoporoids are the principal framebuilding organisms in the patch reef that is part of the reservoir of the Normandville field. The reef is 10 m thick and 1.5 km2in area and demonstrates that stromatoporoids retained their ability to build reefal edifices into Famennian time despite the biotic crisis at the close of Frasnian time. The fauna is dominated by labechiids but includes three non-labechiid species. The most abundant species isStylostroma sinense(Dong) butLabechia palliseriStearn is also common. Both these species are highly variable and are described in terms of multiple phases that occur in a single skeleton. The other species described areClathrostromacf.C. jukkenseYavorsky,Gerronostromasp. (a columnar species), andStromatoporasp. The fauna belongs in Famennian/Strunian assemblage 2 as defined by Stearn et al. (1988).

Download Full-text