Applying a Sustainable Asset Valuation (SAVi) to the Ecological Restoration of the Beira Lake in Colombo: Assessing the Economic Value of Restoration Interventions Analysis

The document evaluates four scenarios for restoring Beira Lake: business-as-usual, wastewater treatment upgrades, dredging, and a combined approach. Using the SAVi tool, it analyzes the impact of these interventions on water clarity, property values, and recreational spending between 2020 and 2025. While the combined approach (Scenario 4) generates the highest total benefits, wastewater treatment upgrades (Scenario 2) offer the highest benefit-to-cost ratio.

• The SAVi assessment analyzed four intervention scenarios for Beira Lake: Scenario 1 (Business-as-usual), Scenario 2 (Wastewater treatment upgrades), Scenario 3 (Dredging of lake deposits), and Scenario 4 (Combined wastewater treatment and dredging). Scenario 4 involves both upgrading wastewater treatment to 100% share and a one-time dredging of 180,000 m3 of lake bottom sediments in 2021.
• Scenario 4 (Combined) produces the most significant economic gains, with property values increasing by over USD 43 million and recreational spending increasing by USD 19.5 million between 2020 and 2025. However, it requires the highest investment at USD 6.3 million, resulting in a benefit-to-cost ratio of 9.92.
• Scenario 2 (Wastewater treatment upgrades) is identified as the most cost-effective option, achieving the highest benefit-to-cost ratio of 39.67. This scenario results in a USD 14.3 million increase in property values by the end of 2025 and approximately USD 10 million in additional spending by locals and tourists over the 2020–2025 period.
• Scenario 3 (Dredging) is less effective than Scenarios 2 and 4, yielding lower increases in property values and recreational spending over time.

APA

Bassi, A. M., Perera, O., Wuennenberg, L., & Pallaske, G. (n.d.). Applying a Sustainable Asset Valuation (SAVi) to the Ecological Restoration of the Beira Lake in Colombo: Assessing the Economic Value of Restoration Interventions Analysis. International Institute for Sustainable Development. https://www.iisd.org/system/files/publications/savi-sri-lanka-beira-lake-brochure-en.pdf

Chicago

Bassi, Andrea M., Oshani Perera, Laurin Wuennenberg, and Georg Pallaske. Applying a Sustainable Asset Valuation (SAVi) to the Ecological Restoration of the Beira Lake in Colombo: Assessing the Economic Value of Restoration Interventions Analysis. International Institute for Sustainable Development, n.d. https://www.iisd.org/system/files/publications/savi-sri-lanka-beira-lake-brochure-en.pdf.

Wikipedia

{{cite report |last1=Bassi |first1=Andrea M. |last2=Perera |first2=Oshani |last3=Wuennenberg |first3=Laurin |last4=Pallaske |first4=Georg |title=Applying a Sustainable Asset Valuation (SAVi) to the Ecological Restoration of the Beira Lake in Colombo: Assessing the Economic Value of Restoration Interventions Analysis |publisher=International Institute for Sustainable Development |url=https://www.iisd.org/system/files/publications/savi-sri-lanka-beira-lake-brochure-en.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{bassindapplying, author = {Bassi, Andrea M. and Perera, Oshani and Wuennenberg, Laurin and Pallaske, Georg}, title = {{Applying a Sustainable Asset Valuation (SAVi) to the Ecological Restoration of the Beira Lake in Colombo: Assessing the Economic Value of Restoration Interventions Analysis}}, institution = {International Institute for Sustainable Development}, url = {https://www.iisd.org/system/files/publications/savi-sri-lanka-beira-lake-brochure-en.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }