Spatial Distribution of Solid Waste Collection Points Using Gis Approach In Urban Katsina, Katsina State, Nigeria

摘要

The advancement of technology today, helps in the depiction of reality for a particular phenomenon. The use of Geographical Information Systems (GIS) as part of the organization helps in develop ment, especially when it comes to analysis and the distribution of facilities within a given area. This paper attempted to map out and analyze the spatial distribution of Solid Waste Collection Points in Urban Katsina using GIS approach. The objectives used in achieving the aim are: To make an inventory for the solid waste collection points in Urban Katsina and to examine the type and patterns of the distribution. Data related to the list of the collection points were sourced from Katsina State Environmental Protection Agency (SEPA) and field survey; and GPS was then used for taking the coordinates (latitude and longitude) of the each solid waste collection point in the study area. Arc GIS 9.3 (version) was used to analyze the result showing that there are 741 collection points in Urban Katsina, from which only 96 (12.96%) are Legal (authorized) while all the other 645 (87.04%) are Illegal (Unauthorized). The paper also revealed that the amount of illegal disposal increases as you move from low to high density settlement areas, while the reverse is the case for refuse hips size. Meanwhile, areas with high population density have more legal collection points than areas with medium population density, with high clusters of illegal collection points aroun d the medium density populated areas. The nearest neighbor analysis shows that both the legal and the illegal collection points, are R- values of 0.67, 0.64 and 0.89 respectively. The study concludes that there is clustering and randomness of the collectio n points' distribution. Therefore, the study recommends for more authorized collection points in the medium population density areas. And population should also be use as a criterion for facility allocation . Moreover, there is need for institutionalization of the use of GIS in waste management.