ISLAMABAD: A new report of the World Bank says Pakistan gets a poor economic return from its significant water resources, observing that the best use of water endowment is not made in the country.

The economic costs from poor water and sanitation, floods and droughts are conservatively estimated to be four per cent of the GDP, or around $12 billion per year. These costs are dominated by the costs of poor water supply and sanitation, says the report titled `Pakistan Getting More from Water`.

The economic costs of degradation of the Indus delta are estimated to be around $2 billion peryear, while the costs of pollution and other environmental degradation have not been assessed.

These estimates of economic benents and costs cannot be directly compared or aggregated, but they demonstrate that the country gets a poor economic return from its significant water resource.

The country does not make the best use of its water endowment and the water use is heavily dominated by agriculture, which contributes around one-fifth of the national GDP, but less than half of this is from irrigated cropping.

Irrigation contributes around $22 billion to annual GDP.

The four major crops wheat, rice, cotton and sugarcane that represent nearly 80pc of all water use generate less than 5pc of the GDP around $14 billion per year. Other economic contributions from water are difficult to accurately assess, but hydropower generation is economically significant, with a current market value of $1 billion to $2 billion.

The report says scant attention is paid to the environmental out-comes from water and waterdependent ecosystems rivers, lakes, wetlands and the Indus delta-areinrapid decline. This decline is characterised by biodiversity loss, greatly reduced stocks of freshwater and estuarine fish stocks, and a loss of other ecosystem services, including the storm protection af forded by coastal mangrove forests.

Excessive water withdrawals and widespread pollution are the main causes of decline, but river fragmentation by inf rastructure and changed sediment regimes contribute.

Water security is undermined by poor water resource management and poor water service delivery including irrigation and drainage services and domestic water supply and sanitation services. In addition, some growing,long-term water-related risks are not adequately recognised and are poorly mitigated.

Water resource management is compromised by poor water data, information, and analysis; weak processes for water resources planning and allocation; environmentally unsustain-able levels of water withdrawal; widespread pollution; and low water productivity in agriculture.

Inadequate monitoring and datamanagementpreventrobust water resource assessments and accounting to guide water planning and management and prevents reliable flood and drought forecasting.

Water resources planning has historically focused on supply augmentation and has not addressed sustainable resource use or been linked adequately to broader economic planning.

Although provincial water shares have been formally defined, they have been demonstrated to be economically suboptimal, and there is insufficient clarity on risk sharing during times of acute scarcity.

These denciencies are expected to become starker with increasing water demands and climate change. Water resources management does little to protect water-dependent ecosystems either by way of environmental flows or pollution control.

The report points out that noformal mechanisms exist within provinces for reallocating water between sectors to match shifting demands or to cope with extreme drought. Irrigation water alloc ation is suboptimal in terms of efficiency, equity, and transparency, contributing to the low productivity of irrigated agriculture and causing a lack of trust between farmers and service providers.

Irrigation service delivery is poor and contributes to low productivity. Hydraulic ef ficiency of water distribution is very low, and water delivery across command areas is inequitable.

Irrigation services are not financially sustainable and financial performance is declining.

Service tariffs are set too low and are decoupled from service quality, and the operational costs of service providers are far too high.

Climate change is the biggest longer-term and currently unmitigated external risk to water sector. Climate change is not expected to greatly alter average water availability over coming decades, but inflows will becomemore variable between and within years, increasing the severity of floods and droughts.

Climate warming is expected to drive water demands up by 5pc to 15pc by 2047, in addition to the demand increases from population and economic growth.

In the upper Indus Basin, accelerated glacial melting will increase the risks of dangerous glacial lake outburst floods. In the lower Indus Basin, sea level rise and increases in the frequency and severity of coastal storms will exacerbate seawater intrusion into the delta and into coastal groundwater. In coastal Sindh, this will further degrade groundwater quality, ground water dependent ecosystems, and irrigation productivity.

A careful assessment of all water resources, drawing on a range of data and past studies, suggests that the current total average annual renewable resource is 229 billion cubic metres (BCM). Only 4pc of this is outside of the Indus Basin.

There is no single simple solution to address water security. It will take concerted effort onmany fronts by all governments and water users over many years.

Large infrastructure gaps must be addressed, which require significant financial resources.

Provincial-level water sector financinghasincreasedinrecent years, but federal financing has declined significantly in proportional terms.

Collectively, sector financing is well below the recommended levels. This is the case for major infrastructure, reforms, and institutional strengthening; urban services; flood mitigation; and environmental management. The biggest challenges, however, are ones of governance, especially regarding irrigation and urban water. The governance challenges relate to inadequatelegalframeworks for water at federal and provincial levels, and the incompleteness of policy frameworks and the inadequacy of policy implementation. The policy deficiencies stem from institutional problem s, including unclear, incomplete, or overlapping institutional mandates, and a lack of capacity in water institutions at all levels.