1999 Fiscal Year Final Research Report Summary
Spatial Water Allocation under Conjunctive Use
| Project/Area Number |
10660209
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Agro-economics
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| Research Institution | Kobe University |
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Principal Investigator |
UMETSU Chieko The Graduate School of Science & Technology, Assistant Professor, 大学院・自然科学研究科, 助手 (40294251)
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| Project Period (FY) |
1998 – 1999
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| Keywords | irrigation / spatial allocation / agricultural production / negative externality / water pollution / mathematical model / simulation / resource economics |
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| Research Abstract |
1) Spatial water allocation model for conjunctive use of canal water and groundwater is further developed. In agricultural projects where the utility invest in conveyance costs of the water canal and when the seepage is reused as groundwater, groundwater emerges as an endogenous backstop technology. When the on-farm technology is low and more water is available for re-use, the optimization over the entire water basin leads to significant increases in aggregate output. 2) A particular attention was given to the effects of conveyance on the allocation of both surface and groundwater resources and the distribution of rents. An empirical model indicated that higher conveyance costs skew the distribution of water as well as rents over the project area. This suggests that the tail farmers need to face substantially higher price for water if the system deteriorates and conveyance costs increase in the long run. 3) We extend static spatial allocation model to a dynamic dimension. We develop static model as 3-period dynamic model and compare water allocation, shadow price, rents, on-farm technology over periods. Temporal allocation is governed by the Hotelling rule and spatial allocation of water is constrained by the amount of the initial stock of water at each period. 4) Finally, we try to develop a theoretical model for considering groundwater pollution by agrochemicals and fertilizers.
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Research Products
(6 results)
