On the use of multivariate techniques in climatic classification and regionalization     

Dr. J. O. Ayoade 《Theoretical and Applied Climatology》1976,24(4):257-267

  相似文献   

Perspectives on the recent drought in the Sudano-Sahelian region of West Africa with particular reference to Nigeria     

Ayoade  J. O. 《Theoretical and Applied Climatology》1977,25(1):67-77

Theoretical and Applied Climatology - This paper examines the nature and causes of the recent drought in the West African Sahel with particular attention paid to the Nigerian situation. Various...  相似文献   

Spatial and seasonal patterns of physiologic comfort in Nigeria   总被引：1，自引：0，他引：1  

Dr. J. O. Ayoade 《Theoretical and Applied Climatology》1978,26(4):319-337

  相似文献   

Geochemical mapping using stream sediments in west-central Nigeria: Implications for environmental studies and mineral exploration in West Africa     

Dan J. Lapworth  Katherine V. Knights  Roger M. Key  Christopher C. Johnson  Emmanuel Ayoade  Michael A. Adekanmi  Tunde M. Arisekola  Olugbenga A. Okunlola  Birgitta Backman  Mikael Eklund  Paul A. Everett  Robert T. Lister  John Ridgway  Michael J. Watts  Simon J. Kemp  Peter E.J. Pitfield 《Applied Geochemistry》2012

This paper provides an overview of regional geochemical mapping using stream sediments from central and south-western Nigeria. A total of 1569 stream sediment samples were collected and 54 major and trace elements determined by ICP-MS and Au, Pd and Pt by fire assay. Multivariate statistical techniques (e.g., correlation analysis and principal factor analysis) were used to explore the data, following appropriate data transformation, to understand the data structure, investigate underlying processes controlling spatial geochemical variability and identify element associations. Major geochemical variations are controlled by source geology and provenance, as well as chemical weathering and winnowing processes, more subtle variations are a result of land use and contamination from anthropogenic activity.  相似文献   

Suitability assessment and mapping of Oyo State,Nigeria, for rice cultivation using GIS     

Ayoade  Modupe Alake 《Theoretical and Applied Climatology》2017,129(3-4):1341-1354

Rice is one of the most preferred food crops in Nigeria. However, local rice production has declined with the oil boom of the 1970s causing demand to outstrip supply. Rice production can be increased through the integration of Geographic Information Systems (GIS) and crop–land suitability analysis and mapping. Based on the key predictor variables that determine rice yield mentioned in relevant literature, data on rainfall, temperature, relative humidity, slope, and soil of Oyo state were obtained. To develop rice suitability maps for the state, two MCE-GIS techniques, namely the Overlay approach and weighted linear combination (WLC), using fuzzy AHP were used and compared. A Boolean land use map derived from a landsat imagery was used in masking out areas currently unavailable for rice production. Both suitability maps were classified into four categories of very suitable, suitable, moderate, and fairly moderate. Although the maps differ slightly, the overlay and WLC (AHP) approach found most parts of Oyo state (51.79 and 82.9 % respectively) to be moderately suitable for rice production. However, in areas like Eruwa, Oyo, and Shaki, rainfall amount received needs to be supplemented by irrigation for increased rice yield.

  相似文献   

Trends and temporal patterns of infant mortality in Nigeria     

Ayoade  Modupe Alake 《GeoJournal》2021,86(4):1835-1848

  相似文献   

A NOTE ON SPATIAL AND SEASONAL VARIATIONS IN WIND SPEED OVER NIGERIA     

J.O. Ayoade  B.Sc.  Ph.D. 《Singapore journal of tropical geography》1980,1(2):11-15

  相似文献