Integrated urban water management in Aracaju, Brazil

Integrated urban water management in Aracaju, the capital city of the Brazilian State of Sergipe (SSE) has been and still is a challenging prospect. Home to half a million people, Aracaju is located in a tropical coastal zone within a semi-arid state and receives below average rainfall of 1,200 mm/year where average rainfall in Latin America is higher at 1,556 mm/yr. (Source:FAO 2000) Most of the residents do have access to the potable water supply and non-revenue water losses are nearly 50%.

The watersheds and rivers feeding the capital city are drought prone; therefore, water scarcity is an ongoing challenge for Aracaju. Aracaju does not have significant groundwater resources, experiences conflicts between urban and agricultural demand, struggles with a weak institutional framework, and discharges untreated wastewater the São Francisco River running through the city. In an attempt to address these water-related challenges, the SSE carried out a multi-stakeholder planning process as part of their economic development plan during the years 2008-2011. The city, with assistance from multinational development banks and organizations is also in the planning stages of a water project that will support institutional improvement and development of the irrigation sector.

Economic aspects

The State of Sergipe (SSE) is one of the smallest, least populated, and poorest states in Brazil. It is located in the northeast region, with an area of 21,910 km2 and a population of about 1.94 million inhabitants, 81.2% of which live in urban areas. The coastal zone of Sergipe, which includes the Metropolitan Region of Aracaju (MRA), concentrates 43.7% (500k) of the state’s population and produces about 56% of the state’s GDP.[1] Sergipe has the highest per capita annual income in the northeast region at $4,378 (R$7,560), but this represents only about 60 percent of the average national per capita income, and some 52 percent of the population earns less than two minimum salaries a month at around $269 (R$465), indicating a high level of poverty.[2] The economy of Aracaju is based on services, industry and tourism. The GDP as of 2005 for the capital city in the SSE was $2.9 billion (R$ 5 billion).[3]

Geography and climate

The state’s semi-arid Sertão and Agreste regions represent 82% of the territory and have an average annual rainfall from 400 to 800 mm/year, while the coastal zone of Aracaju has an average annual rainfall of 1,200 mm/year.[1] This is not much rain when compared to the Amazon basin average rainfall at 8,700mm/yr; however, more in line with the Latin America average of 1556 mm/yr.(Source:FAO 2000) Aracaju has a typical tropical climate, with warm temperatures and high relative humidity throughout the year. January is the warmest month, with an average temperature between 32°C (89.6°F) and 22°C (71.6°F). July experiences the coolest temperatures and most rainfall, with average temperatures between 27°C (80.6°F) and 17°C (62.6°F).

Infrastructure

Water supply

Surface water is the main source of supply, with limited use of groundwater, which is still an unknown and uncertain resource for the area. Aracaju is supplied by the Sergipe and Vazza Barris watersheds making up 6,232 km2 or 28% of the landmass in the state. Together, these two basins convey a flow of water measured at approximately 30 m3/s.(still need the complete reference from "Carta Consulta")[4]

São Francisco river.

Irrigation

Development of irrigation potential in the basin is limited by water scarcity, pollution and conflicts for water allocation especially for urban supply. However, existing irrigation infrastructure could generate a more effective and efficient use if infrastructure is modernized, service delivery is improved and modern irrigation techniques are made available to farmers. Inefficient management of the irrigation perimeters is also a constraint that needs to be addressed to guarantee their sustainability and optimize positive social and economic results.[1]

Water usage & coverage

The total demand for water in the Sergipe river basin is estimated to be of 260,000 m3/day; however, the volume of water provided by the basin itself only amounts to 55,000 m3/day. Transfers from the São Francisco river basin to the MRA cover some of the deficit in availability; however, there are high investment and operating costs associated with these water transfers. The Water supply is available to about 85.2% of the population in the basin; however, access is uneven in social and territorial aspects. The level of water losses in the State Water Supply and Sanitation Utility (DESO) is at 48%, therefore a portion of the population is subject to rationing. As the population of the Sergipe river basin continues to grow at a higher rate than the state average, it is important to maximize the efficiency and effectiveness of the existing and planned infrastructure and the management of water resources and services.[1]

Water challenges

The SSE’s and the capital city of Aracaju’s primary water resources challenges are related to scarcity, water pollution, lack of institutional capacity and framework, and recurrent droughts and floods (which may be exacerbated by climate change and increased hydrological variability). The SSE and Aracaju are currently struggling to confront these challenges in the context of rising urbanization, informality, and pollution.[2]

Water scarcity

Encompassing almost half the State’s population, including most of The Metropolitan Region of Aracaju (Região Metropolitana de Aracaju-RMA), the Sergipe river basin entirely includes eight municipalities and partially includes another eighteen. A water use/availability study found that overall water demand is 260,000 cubic meters per day while the total volume of water provided by the basin itself is only 55,000 cubic meters per day. This indicates a water deficit of over 80 percent.[2] The shortfall is covered in part by transfers from the São Francisco River. Water scarcity is further exacerbated by the contamination of water resources in urban areas in and around the RMA due to ongoing urbanization and informal occupants.[2]

Water Pollution

Pollution of water resources further aggravates scarcity. The main sources of pollution are the discharge of untreated wastewater and inadequate disposal of solid waste. Only an average of 38.7% of the population has access to sewerage, and untreated sewer discharged into water bodies contributes to the basin’s downstream pollution. With regards to solid waste, even though 80% of the population is covered by solid waste removal services, adequate disposal of this waste does not exist. Solid waste is disposed of in open air dumps along highways, in mangroves, or in areas close to water causing severe urban and environmental impacts.[1]

Weak Institutional Capacity

Currently, the State of Sergipe (SSE) does not have an adequate institutional framework and set of tools in order to plan, manage, and regulate water resources and water service provision in an integrated manner. The state has several agencies for water management, environmental policies, irrigation, and agricultural development, but the institutional capacity of these agencies is limited and roles and responsibilities are not well clarified.[1]

Response to challenges

The World Family Summit program has created the "Sergipe Practical Plan of Action 2006-2015" that has set goals in line with the Millennium Development Goals (MDGs) to ensure access to adequate drinking water and sanitation. Furthermore this plan defines and investment strategy for the management of freshwater resources and great control of water pollution.[5]

The State of Sergipe (SSE) engaged in a participatory planning process with a priority on water that involved public consultations with civil society and identified priority areas of intervention. This participatory planning process served as a key input to SSE’s 2008-2011 economic development and government action plan, which selected integrated management of natural and water resources, solid waste and sanitation services as one of the SSE’s key priorities.[1]

Key Institutions

Sergipe is a small and poor state, with several agencies in charge of environment, water resources, irrigation management, water supply, and wastewater regulation. Theses institutions share responsibilities within some projects and what follows provides some explanation of this; however, this is by no means a clear definition as the SSE remains mired in institutional incapacity. For example, and with regards to integrated water resources management (IWRM) and institutional development, SEMARH may handle technical and safeguards issues while UAPAS deals with procurement and financial management. Water and irrigation initiatives appear to be the domain of COHIDRO and UAPAS. DESO takes on all components (safeguards, technical, procurement, financial management) when dealing with water and cities projects.[2]

Legal Framework

As with the institutional framework, the legal framework within the SSE needs further clarification. There have been advances in the legal framework of water resources management, information systems, and planning efforts at state and river basin levels, but implementation of governance instruments for modern water management and services regulation is only just emerging.[1]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 World Bank (2009). "PROJECT CONCEPT NOTE BRAZIL: Sergipe Water Project". The World Bank. Retrieved 2009-09-14.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 The World Bank (2009). "Sergipe water project – Project Appraisal Document". The World Bank. Retrieved 2009-10-29.
  3. ↑ GDP (in Portuguese). IBGE. 2005. Retrieved 2007-07-18.
  4. ↑ "Carta Consulta". 2009.
  5. ↑ World Family Summit (2005). "Investing in Development: Working the Millennium Development Goals at the Local Level and in the Family". World Family Summit. Retrieved 2009-09-25.
  6. ↑ DESO (2009). "Information about DESO" (in Portuguese). DESO. Retrieved 2009-09-29.
  7. ↑ SEMARH (2009). "Information about SEMARH" (in Portuguese). SEMARH. Retrieved 2009-09-29.
  8. ↑ Cap-Net (2009). "Programa PROAGUA, Agencia Nacional de Aguas (ANA), BRAZIL". Retrieved 2009-09-29.
  9. ↑ COHIDRO (2009). COHIDRO "information and services". COHIDRO. Retrieved 2009-09-29.