ارزش گذاري آب هاي زيرزميني در بهره برداري هاي کشاورزي مورد مطالعه برنجکاران شهرستان رامهرمزدر استان خوزستان
محورهای موضوعی : مقاله پژوهشی
محسن موسایی
1
,
مهسا حسین زاده
2
,
مهرداد مرادی
3
1 - دانشیار ترویج و آموزش کشاورزی، گروه مدیریت کشاورزی، دانشگاه آزاد اسلامی واحد گچساران، ایران
2 - دانش آموخته کارشناسی ارشد دانشگاه آزاد اسلامی واحد شوشتر، شوشتر، ایران
3 - استادیار اقتصاد کشاورزی، گروه اقتصاد کشاورزی دانشگاه آزاد اسلامی واحد یاسوج، ایران
کلید واژه: ارزش گذاري, آب هاي زيرزميني, برنج, شهرستان رامهرمز ,
چکیده مقاله :
مقدمه: در حال حاضر بخش کشاورزي عمده ترين مصرف کننده آب زيرزميني در اين منطقه، در بين بخش هاي مختلف اقتصادي محسوب مي گردد، که به دليل بهره برداري بيش از حد از آب هاي زيرزميني ميزان افت سالانه سطح اين آب ها قابل توجه است. بنابراين، محاسبه ارزش اقتصادي هر واحد آب و محاسبه اثر هاي جانبي برداشت بيش از حد از منابع آب اهميت بالايي دارد. در اين مطالعه، به تعيين ارزش اقتصادي آب، حد بهينه استفاده از نهاده آب و اثر تغيير سطح آب هاي زيرزميني بر سطح رفاه اجتماعي توليدکنندگان برنج شهرستان رامهرمز پرداخته مي شود.
روش: به اين منظور ابتدا تابع توليد مناسب تخمين زده شد و با استفاده از آن ارزش اقتصادي آب و حد بهينه استفاده از نهاده آب تعيين گرديد. آن گاه با تشکيل تابع سود يا رفاه اجتماعي، اثر تغيير در سطح آب هاي زيرزميني بر مقدار رفاه اجتماعي توليدکنندگان تعيين شد.
یافته ها: نتايج اين تحقيق نشان مي دهد که ارزش اقتصادي آب در منطقه مورد مطالعه به ازاي هر مترمکعب 54/649 ريال است. به طوري که ارزش اقتصادي هر واحد آب بيش از هزينه استخراج هر واحد آن است که اين اختلاف منجر به برداشت بي رويه از آب هاي زيرزميني و کاهش سطح آب هاي زيرزميني و در نهايت کاهش رفاه توليدکنندگان برنج مي گردد. به طوري که اگر سطح آب هاي زيرزميني 81/0 متر کاهش يابد، از سود اجتماعي بهره برداران 61/1110257 ريال کاسته مي شود.
نتیجه گیری: اين مطالعه پيشنهاد مي کند که علاوه بر سياست هاي قيمتي، از راه حل هاي غير قيمتي مانند اعمال محدوديت هايي بر ميزان استخراج آب، در جهت حفظ سفره هاي آب زيرزميني استفاده گردد.
Introduction: Currently, the agricultural sector is considered to be the major consumer of underground water in this region, among different economic sectors, and due to excessive exploitation of underground water, the annual drop in the level of these waters is significant. Therefore, calculating the economic value of each unit of water and calculating the side effects of over-harvesting water resources is very important. In this study, the determination of the economic value of water, the optimal level of water input use and the effect of changing the groundwater level on the level of social well-being of rice producers in Ramhormoz city are discussed.
Method: For this purpose, the appropriate production function was first estimated, and using it, the economic value of water and the optimal limit of water input use were determined. Then, by forming the function of profit or social welfare, the effect of change in the level of underground water on the amount of social welfare of the producers was determined.
Findings: The results of this research show that the economic value of water in the study area is 649.54 rials per cubic meter. So that the economic value of each unit of water is more than the cost of extracting each unit, and this difference leads to excessive extraction of underground water and the reduction of the level of underground water, and finally the welfare of rice producers. So that if the underground water level decreases by 0.81 meters, the social benefit of the beneficiaries will decrease by 1110257.61 riyals.
Conclusion: This study suggests that in addition to price policies, non-price solutions such as applying restrictions on the amount of water extraction should be used in order to preserve underground water tables.
1. Kopai M. The importance and position of underground water in the hydrological cycle. In: Proceedings of the Second National Student Conference on Water and Soil Resources. Shiraz; 2004. https://civilica. Com /doc /9907
2. Abrishamchi A, Tajrishi M. Management of the country’s water resources demand. In: Proceedings of the first conference on methods of preventing the loss of national resources. Tehran; 2004. https://civilica .com /doc/26600
3. Hosseinzad H. Determining the approprgrgiate method of water pricing in the agricultural sector, case study: Alavian dam and network. University of Tehran; 2004.
4. Chizari A, Mirzaei A, Karamatzadeh A. Determining the economic value of agricultural water using the model of the optimal cultivation pattern combining agriculture and horticulture: a case study of Barzo Shirvan Dam. Agricultural Economics and Development. 2006;14(2):35–60. 10.30 490/aead.2006.58914
5. Chitsazan M, Mousavi S, Mirzaei Y. Studying the effects of drought on Ramhormoz plain aquifer. In: Proceedings of the second national conference on the effects of drought and its management solutions. Isfahan; 2009. https:// civilica.com/doc/67370
6. Soltani G, Zibai M. Pricing of agricultural water. Water and Development, Water Affairs Quarterly of the Ministry of Energy. 1996;1(14):12–21. https://sid.ir/paper/438417/fa
7. Zare Mehrjardi M, Rezaei. A, Ziyaabadi. M. Evaluation of underground water with quality approach; A case study of pomegranate growers in the city of Bod. Irrigation and water engineering scientific research quarterly. 2012;3(10):11–18.
8. https://www.waterjournal.ir/article_70600_9d1473b54fbecc58b5e5e9b19f0a760
9. Agudelo, J.I. The Economic Valuation of Water: principles and Methods. 2001. https://www.researchgate.net/publication/228471046_
10. Ahmadian M, Inteziri A. Valuation of underground water in the agricultural exploitation of wheat farmers in Khatam city in Yazd province (Herat district). Journal of sustainability, development and environment. 2014;1(3):27–39. https://www.magiran.com/p1691146
11. Birol K, Koundouri P. Using economic valuation techniques to inform water resources management: A survey and critical appraisal of available. techniques and an application. Science of the Total Environment. 2006;365:105–22. 10.1016/j.scitotenv.2006.02.032
12. Joanpoor P, Keri L. Exploring the hedonic value of ambient water quality: A local watershed-based study. Ecological Economics. 2007;60:797–806.10.1016/j.ecolecon.2006.02.013
13. Moran D, Dann S. The economic value of water use: Implications for implementing the water framework directive in Scotland. J Environ Manage. 2008;87:484–96. 10.1016/j.jenvman.2007.01.043
14. Fontes P, Carneiro A. Land suitability, water balance and agricultural technology as a geographic-technological index to support regional planning and economic studies. Land using Policy. 2009;26:589–98. 10.1016 /j.landusepol.2008.08.010
15. Khalilian p, Zare Mehrjardi M. Valuation of underground water in agricultural operations: a case study of wheat farmers in Kerman city. Agricultural Economics and Development. 2005. 13) 2(:1–14. 10.30490 /aead.2005.128570
16. Panahi A, Mohammadi H. Economic analysis of production and management of water demand in rice farmers of Fars province. 2007.
17. Tahamipour M, Mehrabi H, Karbasi A. The effect of reducing the level of underground water on the social welfare of producers: a case study of pistachio farmers in Zarand city. Agricultural Economics and Development. 2005;13(49) :97–116. https: // sid.ir /paper/24400/fa
18. Huang Q, Rozelle S, Howitt R. Irrigation water pricing policy in China. In: Selected paper prepared for presentation at the American Agricultural Economics Association Annual Meeting. Long beach, California; 2006. https://www.researchgate.net/publication/23506523
19. Huang Q, Rozelle S., Howitt R. The efficient use of data in estimating production technology: Trading off precision and heterogeneity. 2008. https: //www.researchgate.net/publication/228602357
20. Blingnut J, Van Eyden R, Moolman C. Modelling the marginal revenue of water in selected agricultural commodities: A panel data approach. Agrekon. 2006;45(1):78–91. 10.1080 /03031853.2006.9523735
21. Gayatri A, Barbier E. Valuing groundwater recharge through agricultural production in hadejia. Agricultural Economical. 2000;22:247–59. 10.1111/j.1574-0862.2000.tb00073.x
22. Brimnejad V. Extraction of water demand function from polynomial production function in agriculture sector. Scientific Journal of Agriculture.30(2):107-116 2007. https://sid.ir/ paper /44 7375/fa
