The proceeds of such assessments, whether or not pledged for the payment of securities, shall be segregated from other funds of the municipality and shall be used only to pay for the construction, reconstruction, repair, maintenance, supervision, operation or management of the flood prevention, climate resilience and erosion control system or particular portion thereof in respect to which such assessments are made or, as the case may be, for the payment of the interest on or principal of any securities issued to pay for such system or particular portion thereof.