International discussions on the demand responsive approach (DRA) started in the mid-1990s because past supply-driven approaches had led to the failure of many water supply and sewerage/on-site sanitation (WS&S/OS) projects in developing countries (DCs). DRA has already been adopted in many WS&S/OS projects targeting a certain rural or poor urban area(s) by using various demand assessment techniques such as participatory rapid appraisal (PRA) to select optimum technical options. However, adoption of DRA in large-scale urban WS&S/OS projects (covering various areas of different socio-economic groups with different needs) has been relatively delayed. Recently, the participatory geographic information system (PGIS) has emerged as an effective method of PRA, and high resolution satellite imagery (HRSI) has become commercially available. This paper presents a PGIS-based visual area categorization of different income groups using HRSI as a key for expediting the adoption of DRA to large-scale projects in DCs. This paper proposes an innovative pro-poor methodology of DRA for large-scale urban WS&S/OS projects. The methodology focuses on the improvement of multistage sampling in a household sample survey to plan mixed services suitable for various groups. The results of a partial application of the methodology in Pakistan are also presented.
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August 2011
This article was originally published in
Journal of Water Supply: Research and Technology-Aqua
Article Contents
Research Article|
August 01 2011
Innovative methodology of demand responsive approach for large-scale water supply and sewerage/on-site sanitation projects in developing countries using participatory GIS with high resolution satellite imagery
Shozo Mori;
1Nihon Suido Consultants Co., Ltd., 22-1, Nishi-Shinjuku 6-Chome, Shinjuku-ku, Tokyo, Japan 163-1122
E-mail: [email protected]
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Ihsanullah;
Ihsanullah
2Peshawar University, Peshawar, Pakistan 25120
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Akira Koizumi;
Akira Koizumi
3Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji-shi, Tokyo, Japan 192-0397
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Chinatsu Maeda;
Chinatsu Maeda
1Nihon Suido Consultants Co., Ltd., 22-1, Nishi-Shinjuku 6-Chome, Shinjuku-ku, Tokyo, Japan 163-1122
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Kazuhiro Asada;
Kazuhiro Asada
1Nihon Suido Consultants Co., Ltd., 22-1, Nishi-Shinjuku 6-Chome, Shinjuku-ku, Tokyo, Japan 163-1122
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Yoshiaki Yokota;
Yoshiaki Yokota
1Nihon Suido Consultants Co., Ltd., 22-1, Nishi-Shinjuku 6-Chome, Shinjuku-ku, Tokyo, Japan 163-1122
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Masayuki Mori
Masayuki Mori
1Nihon Suido Consultants Co., Ltd., 22-1, Nishi-Shinjuku 6-Chome, Shinjuku-ku, Tokyo, Japan 163-1122
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Journal of Water Supply: Research and Technology-Aqua (2011) 60 (5): 294–304.
Article history
Received:
November 10 2010
Accepted:
April 15 2011
Citation
Shozo Mori, Ihsanullah, Akira Koizumi, Chinatsu Maeda, Kazuhiro Asada, Yoshiaki Yokota, Masayuki Mori; Innovative methodology of demand responsive approach for large-scale water supply and sewerage/on-site sanitation projects in developing countries using participatory GIS with high resolution satellite imagery. Journal of Water Supply: Research and Technology-Aqua 1 August 2011; 60 (5): 294–304. doi: https://doi.org/10.2166/aqua.2011.081
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