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This study applies a production function approach to value the groundwater recharge function of the Hadejia-Nguru wetlandsin northern Nigeria. The groundwater recharge function supports dry season agricultural production which is dependent ongroundwater abstraction for irrigation. Using survey data this paper first carries out an economic valuation of agriculturalproduction, per hectare of irrigated land. We then value the recharge function as an environmental input into the dry seasonagricultural production and derive appropriate welfare change measures. Welfare change is calculated using the estimatedproduction functions and hypothetical changes in groundwater recharge and hence, groundwater levels. By focusing onagricultural production dependent solely on groundwater resources from the shallow aquifer, this study establishes that thegroundwater recharge function of the wetlands is of significant importance for the floodplain. © 2000 Elsevier Science B.V.All rights reserved.

Keywords: Production function approach ; Valuation ; Wetlands ; Groundwater recharge ; Ecosystem function

Subject(s): Crop Production/Industries

Production Economics

Issue Date: 2000-04

Publication Type: Journal Article

PURL Identifier: http://purl.umn.edu/175434 Published in: Agricultural Economics: The Journal of the International Association of Agricultural Economists, Volume 22, Issue 3 Page range: 247-259

Total Pages: 14

JEL Codes: QlO; Q25

Record appears in: International Association of Agricultural Economists (IAAE) > Agricultural Economics: The Journal of the International Association of Agricultural Economists





Autor: Acharya, Gayatri ; Barbier, Edward B.

Fuente: http://ageconsearch.umn.edu/record/175434?ln=en







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