Complexities of the urban drinking water systems in Ethiopia and possible interventions for sustainability

Abstract

Rapid urbanization in developing countries has imposed threats and challenges to basic urban infrastructures like drinking water, transportation, and energy systems. The existing urban drinking water systems (UDWS) are highly stressed and unsustainable, particularly under changing hydroclimatic conditions, population growth, changing socioeconomic conditions, government decisions, and various policies. This study focuses on the complexities of UDWS in Sub-Saharan African countries, especially in Ethiopia. The objective of this study is to investigate the issues and challenges of urban drinking water systems (UDWS) in Ethiopia, specifically, to assess the gap between water supply and demand, water loss/non-revenue water, environmental, technical, institutional, and governance, etc. and propose sustainable interventions to deal with such issues so as to improve. For this purpose, a mix of methods involving primary data (including key informant interviews, field observations, and field measured data) and secondary data (including published articles, books, various reports, and design documents), as well as various computer-aided applications (mainly, ArcGIS and WaterGEMS) are used to collect data. The issues are deliberated through the UDWSs of Addis Ababa, Adama, Mekelle, and Dire Dawa cities in Ethiopia. Complexities like water shortage, high and low pressure in the water distribution network (WDN), non-revenue water (NRW)/water loss, source pollution, ineffective policies and governance, and weak institutions are the main challenges to Ethiopian cities' water utilities. Further, the case study noticed that in Addis Ababa alone, potable water is only accessible to 66% of the city population. A significant water supply deficit was observed in Mekelle city, where only half of the city population has access to potable water from the system. Additionally, in Addis Ababa, Adama, Mekelle, and Dire Dawa, above 35% of the freshwater produced is either NRW, unaccounted for, or lost, which is significantly higher than the upper 25% limit suggested by the World Bank. Therefore, it is recommended to adopt certain sustainable interventions, such as integrated water resource management, installing appurtenances like pressure-reducing valves, check valves in the WDN, controlling and monitoring of WDN through supervisory control and data acquisition and Internet of Things, effective and long-term planning and policy, etc. It is felt that the study will help the decision-makers and the operators of the UDWS utilities to run the water supply schemes in a sustainable manner. Supplementary Information The online version contains supplementary material available at 10.1007/s10668-022-02901-7.

Global Events and Surge in Residential Water Demand: Exploring Possible Hydraulic Scenarios

“…In contrast, the highest pressure is recorded at node 10, with a value of 128.11 m. A pressure reduction valve should be installed at nodes with service pressures larger than those specified by local regulations. These steps will aid in the optimization of the water distribution system and the efficient supply of water to the network [51].…”

Interdependence of rural household welfare measurement in the context of climate variability in Ethiopia

“…The empirical literature that is now available supports the claim that climate change and extreme events have hindered economic growth by decreasing agricultural production and food supply, destroying social infrastructure, and threatening efforts to reduce poverty and increase consumption [ 21 , 22 ]. In addition, being unable to access improved water has an adverse impact on health and other social welfare issues [ 23 ]. Yet, welfare increases when agricultural productivity is strong and the weather is favorable [ 13 ].…”

Climate resilience of small-town water utilities in Eastern Ethiopia

“…Intense rainfall, severe storms, dry spells, extremely hot days, and storm surges damage or destroy water supply infrastructure and reduce the availability of water resources [1,2], all of which have an impact on water supply and quality [1][2][3][4][5][6][7]. This has amplified concerns in the water and sanitation (WASH) sector, resulting in increased efforts to improve services in the low and middle-income countries, where climate change may have the most severe impacts [8][9][10][11]. In urban areas, climate change exerts additional pressure on the operation of water utilities [12].…”

“…As part of this programme, a sustainability check framework was proposed to monitor the performance of such utilities [23]. Application of this framework in small towns revealed unreliable services with inadequate water supply quantities; low cost recovery and technical capacity in small-town utility-managed water supplies [24,25]. This does not bode well for the ability of these systems to prepare for climate change.…”