Abstract
Abstract The paper presents the development and implementation of a geo-spatial model for mapping populations’ access to specified types of water and sanitation services in Nigeria. The analysis uses geo-referenced, population-representative data from the National Water and Sanitation Survey 2015, along with relevant geo-spatial covariates. The model generates predictions for levels of access to seven indicators of water and sanitation services across Nigeria at a resolution of 1 × 1 km2. Overall, the findings suggest a sharp urban–rural divide in terms of access to improved water, basic water, and improved water on premises, a low availability of piped water on premises and of sewerage systems throughout the country, a high concentration of improved sanitation in select states, and low rates of nationwide open defecation, with a few pockets of high rates of open defecation in the central and southern non-coastal regions. Predictions promise to hone the targeting of policies meant to improve access to basic services in various regions of the country. This article has been made Open Access thanks to the generous support of a global network of libraries as part of the Knowledge Unlatched Select initiative.
Highlights
Benson Ajisegiri Federal Ministry of Water Resources, NigeriaSamir Bhatt Imperial College London, London, UKBasab Dasgupta Social Impact, Impact Evaluation Division, Arlington, Virginia, USAJuan A
The findings suggest a sharp urban–rural divide in terms of access to improved water, basic water, and improved water on premises, a low availability of piped water on premises and of sewerage systems throughout the country, a high concentration of improved sanitation in select states, and low rates of nationwide open defecation, with a few pockets of high rates of open defecation in the central and southern non-coastal regions
Efforts to measure access to water and sanitation around the world have provided a certain level of aggregation at the subnational level, such as for particular government districts, but rarely do we encounter highresolution maps for entire countries
Summary
Benson Ajisegiri Federal Ministry of Water Resources, NigeriaSamir Bhatt Imperial College London, London, UKBasab Dasgupta Social Impact, Impact Evaluation Division, Arlington, Virginia, USAJuan A. Echenique School of Public Policy, University of Maryland, College Park, Maryland, USA. Efforts to measure access to water and sanitation around the world have provided a certain level of aggregation at the subnational level, such as for particular government districts, but rarely do we encounter highresolution maps for entire countries. Using survey data to map particular indicators is difficult for a number of. The absence of reliable, granular, evenly distributed, geo-referenced data makes it difficult to accurately compare water, sanitation, and hygiene (WASH) access across a country, or to identify those areas in greatest need of investment
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