연안역 어업피해조사의 부유사 확산에 따른 어업피해율 산정의 개선방안에 관한 연구

Abstract

This study aims to quantitatively analyze the impact of suspended sediment dispersion caused by marine development projects on fisheries, and to propose improvement measures that overcome the limitations of the existing Theory of Critical Environmental Variation Quantum(CEVQ)-based damage rate estimation methodology. The conventional method applies uniform criteria without adequately considering regional variations in background suspended sediment concentrations or project-specific scales, resulting in either underestimation or overestimation of damage rates. To address this, the study first introduces a nonlinear transformation function based on a logarithmic function that reflects background suspended sediment concentrations by region, allowing adjustment of the sensitivity in estimating fisheries damage rates. Second, a construction volume adjustment coefficient is developed based on the amount of suspended sediment generated per project, and applied multiplicatively to the transformation function, resulting in the development of an extended model. The nonlinear transformation function mitigates potential overestimations by moderating damage responses beyond critical thresholds and captures region-specific environmental sensitivity. The construction volume adjustment coefficient allows proportional modification of the damage rate based on project scale, thereby reflecting the practical impact more accurately. Application of the models to three case studies representing the East Sea, South Sea, and West Sea demonstrated the effectiveness of the improvements. Compared to the conventional CEVQ theory, the nonlinear transformation function alone reduced the average damage rate by approximately 61.3%. When the extended model was applied, some increase in damage rates was observed, especially in large-scale projects, thus enhancing quantitative realism. Notably, fisheries rights located in high-background suspended solids concentration regions or far from the dispersion source showed significantly reduced damage rates, whereas those near the center of the dispersion area or in large-scale projects exhibited increased rates. These outcomes verify that the proposed model appropriately incorporates both environmental characteristics and project scale. In conclusion, the nonlinear transformation function and extended model (nonlinear transformation function + project volume adjustment coefficient) proposed in this study provide a scientifically grounded and objective method for estimating fisheries damage rates. These models can serve as a theoretical basis for establishing future institutional compensation standards.

Keyword: Fisheries Damage Assessments, Fisheries Damage Rate, Critical Environmental Variation Quantum, Fisheries Damage from Suspended Sediment Concentration, Background Suspended Sediment Concentration