An Ex Post Evaluation for a Development Project Using the Changes in Productivity Approach. A Case Study on the Hitachi River Flood Gate Project on Lake Kasumigaura.:-A Case Study on the Hitachi River Flood Gate Project on Lake Kasumigaura-
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The purpose of the changes in productivity approach is to reveal how productivity is affected by environmental impacts of construction projects in a vicinity. The method utilized is a technique in which we evaluate the social benefits and costs. This is most appropriate in evaluating the external effects of a project. In our case, we established a method to be included in the procedure of incidence analysis ; (1) who gains, (2) who loses and (3) who is responsible for eliminating any adverse effects and who compensates, from a viewpoint of fairness. In the application of our approach, when the project is not in place, we consider secondary industries like mining and manufacturing using their annual average growth rates, while for primary and tertiary industries we use their highest (or lowest) productivity levels. We think that the method could prove persuasive for promotion of projects. When we applied the method to evaluate the Hitachi River Flood Gate Project for Lake Kasumigaura i.e. a gate in place to prevent backward flow into Lake Kasumigaura from the Tone River, we found that industries such as chemicals, iron and steel benefitted along with local agriculture in the productivity of vegetables and raising pigs, and carp in fish farms while fisheries and tourism suffered. When we take the question of water pollution and the use put to by the water resources of Lake Kasumigaura, into account, we cannot overlook the benefits gained by the Kashima waterfront industrial area. Consideration, using our method, of the regional economic development balance sheet reveals that the area has a large area of plant site and its use of large quantities of industrial water. To make matters worse, it is responsible for large amounts of sewage discharge including industrial waste. Our results show that the chemical, iron and steel industries use an excessive amount of water from Lake Kasumigaura, and agricultural productivity of vegetables (especially lotus roots), and carp farming, also receive significant benefit from the Flood Gate Project at the expense of tertiary industries like tourism and commercial fishing.
- 社団法人 環境科学会の論文
社団法人 環境科学会 | 論文
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