A Model for Estimating Capital Stocks of Main Irrigation and Drainage Facilities with Consideration of Stock-Management Measures

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  • 施設の長寿命化を考慮した基幹農業水利資本ストックの推計モデル
  • シセツ ノ チョウジュミョウカ オ コウリョ シタ キカン ノウギョウ スイリ シホン ストック ノ スイケイ モデル

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Abstract

Effective renovation of irrigation and drainage facilities through stock management measures is highly needed because of drastic decreases in budgets of agricultural public investment. The present study aims to develop an estimation model for main irrigation and drainage capital stocks with considering stock-management measures. This model can evaluate two effects which mean to use old facilities to the end of lifetime with low dead-costs and to reuse old parts of facilities in renewed facilities. Applying this model to the Japanese macroeconomic statistics demonstrated that the chronological trend of capital stocks of irrigation and drainage facilities were different from our expectation based on the point estimations published by Ministry of Agriculture, Forestry and Fishery. Furthermore, predicting capital stocks of irrigation and drainage facilities by this model can help policy decision making on agricultural public investment and evaluation of stock management measures.

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