Harnessing Solar Water Pumping Technologies for Sustainable Water Supply in Kenya: A Case Study of Kajiado Central Sub-County, Kenya. A Retrospective Baseline Study.
Okwiri Minado Saad, Ali Hassan Khamah, Michael Kairu Murimi, Mapema N
🤖 gxceed AI 要約
日本語
ケニア・カジアド中央サブカウンティにおける太陽光水ポンプ技術（SWPT）の長期性能を評価。ディーゼル比60-75%のコスト削減を確認する一方、太陽光の限界費用ゼロが過剰揚水を誘発し、帯水層低下とフッ素超标の問題を指摘。制度的ガバナンスと連動した技術拡大の必要性を提言。
English
This retrospective baseline study evaluates solar water pumping technology (SWPT) in Kajiado County, Kenya, over 2015-2024. It finds 60-75% cost reduction compared to diesel, but warns that zero-marginal-cost solar power incentivizes over-pumping, accelerating aquifer depletion and distributing untreated water exceeding WHO fluoride limits. Recommends coupling technical upscaling with institutional governance.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本はアフリカの水インフラ支援や再生可能エネルギー技術輸出に関心を持つが、本論文は太陽光ポンプ導入に伴う地下水資源管理の課題を示す点で、ODA事業や技術協力の設計に示唆を与える。
In the global GX context
Globally, this paper contributes to the energy-water nexus literature by empirically documenting that solar water pumping, while reducing operational costs and emissions, can exacerbate groundwater depletion and health risks if unregulated. It underscores the need for integrated governance in renewable energy transitions.
👥 読者別の含意
🔬研究者:Provides an empirical baseline for socio-technical dynamics of solar water pumping in data-scarce regions.
🏢実務担当者:Highlights that solar pumps require accompanying regulations to prevent over-pumping and ensure water quality.
🏛政策担当者:Offers evidence for integrating spatial drilling limits and mandatory defluoridation into renewable energy plans.
📄 Abstract（原文）
Kajiado County suffers from acute water scarcity caused by climate-driven droughts and surface-water deficits that severely threaten agro-pastoral livelihoods, forcing a reliance on groundwater extraction across unserved zones of Kajiado Central Sub-County. Weak regulatory oversight has led to uncoordinated, dense borehole clustering that causes localized static water tables to drop rapidly, while private water pricing strains household economies and unregulated extraction bypasses public health monitoring for hazardous geogenic fluoride. This study implements a comparative ex-post facto retrospective research design spanning a ten-year operational horizon (2015–2024) to evaluate the long-term performance of resource-efficient Solar Water Pumping Technology (SWPT) as an alternative to conventional diesel and grid regimes. Temporally, the study covers a ten-year horizon from 2015 to 2024 and relies exclusively on historic secondary datasets available as of December 2024; no projected or preliminary 2025 data are included. Synthesizing Common-Pool Resource (CPR) and Socio-Technical Systems (STS) theories, the study relies on archival secondary data sourced from the Kajiado County Ministry of Water, the Water Resources Authority (WRA), and public health registries, evaluated via the Mann–Kendall trend test, linear regression, and thematic analysis. The empirical findings reveal that transitioning to solar water pumping lowers operational costs by 60%–75% compared to diesel (SNV, 2022), yet the zero-marginal cost of solar power creates an economic incentive for unrestricted over-pumping that accelerates aquifer drawdown, while the clean energy transition exhibits a major health compliance gap by routinely distributing untreated water that exceeds the WHO 1.5 mg/L fluoride threshold (WHO, 2017). Technical upscaling must be legally bound to institutional governance; this study provides an empirical baseline for the Kajiado County Government to enforce spatial drilling limits, embed solarized frameworks into the County Integrated Development Plan (CIDP), and deploy mandatory solar-powered defluoridation units to ensure long-term climate resilience and public safety.
🔗 Provenance — このレコードを発見したソース
- Zenodo https://zenodo.org/records/21429229first seen 2026-07-19 04:13:02
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