The Asian Development Bank (ADB) is considering supporting the (re)construction of four wastewater treatment plants in Stepnogorsk, Satpaev, Zhezkazgan, and Balkhash. Detailed engineering designs are being prepared by designers recruited by Vodokanals. Climate change impacts may exacerbate environmental pollution and other adverse effects of aging infrastructure on service delivery. FutureWater conducted a Climate Risk Assessment (CRA) to ensure that climate impacts are fully considered in the detailed design and construction phases.

The CRA identified the main vulnerability components for the four proposed wastewater treatment plants as: (i) extreme precipitation leading to stormwater runoff, (ii) low flows causing water quality problems, (iii) flooding of infrastructure (both fluvial and pluvial), (iv) power supply outages, and (v) heat stress. FutureWater’s risk assessment, which considered the combined effects of hazard, vulnerability, and exposure, concluded that all five major identified risks require attention. Since the draft designs already account for the current extreme climate conditions, and due to relatively modest projected climate changes (temperature, precipitation, wind), the need for additional adaptation measures will be relatively modest.

FutureWater’s assessment contributed to ensuring that the four wastewater treatment plants will be climate-resilient, thereby securing the investment.