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بررسی پیامدهای محیطی ناپایداری منابع آب در حوضۀ آبریز رودخانۀ زاینده‌رود | ||
| پژوهش های جغرافیای طبیعی | ||
| مقاله 13، دوره 50، شماره 2، تیر 1397، صفحه 391-406 اصل مقاله (1.45 M) | ||
| نوع مقاله: مقاله کامل | ||
| شناسه دیجیتال (DOI): 10.22059/jphgr.2018.226191.1006997 | ||
| نویسندگان | ||
| سعید صالحیان1؛ عبدالرضا رحمانی فضلی* 2 | ||
| 1دانش آموختة جغرافیا و برنامه ریزی روستایی، گروه جغرافیای انسانی و آمایش، دانشکدة علوم زمین دانشگاه شهید بهشتی تهران | ||
| 2دانشیار گروه جغرافیای انسانی و آمایش، دانشکدة علوم زمین، دانشگاه شهید بهشتی تهران | ||
| چکیده | ||
| حوضة آبریز زاینده‌رود در منطقة مرکزی ایران از مناطقی است که دارای مسئلة ناپایداری منابع آب است. در این پژوهشـ با روشهای تحلیل تغییرات کاربری ارضی، بررسی تغییرات بهرهبرداری از آبهای زیرزمینی، و توزیع پرسشنامهـ پیامدهای محیطی ناپایداری منابع آب در حوضة زاینده‌رود بررسی شده است. بر این اساس، تغییرات کاربری زمین بین سالهای 1380 و 1392 و تحول چاهها و سفرة آب زیرزمینی بین سالهای 1385 و 1390 مطالعه شده است و، با توجه به شدت بیشتر خشکسالی در پاییندست، در سکونتگاههای روستایی محدودة پاییندست حوضه، پرسشنامه توزیع شده است. بر اساس فرمول کوکران، تعداد پرسشنامهها از تعداد 33153 خانوار روستایی 380 نفر برآورد شده که، در طی تحقیق و بر اساس محدودیتها و حذف پرسشنامههای نادرست، تعداد نمونهها به 323 مورد رسیده و در تعداد 25 روستا توزیع شده است. نتایج پژوهش نشان میدهد ناپایداری منابع آب در حوضة آبریز زاینده‌رود آثار محیطی نامناسبی دارد و پایداری حوضه را با خطر جدی روبهرو کرده است. تغییرات Land use حوضه نشان از دستاندازی گستردة فعالیتهای انسانی در حوضه داشته و، از طرفی، با خشکی رودخانه، فشار بر سفرههای آب زیرزمینی تشدید شده است. میانگین شاخصهای پرسشنامة پیامدهای خشکسالی نیز عدد 22/4 بهدست آمده که نشان از وضعیت نامناسب شاخصهای زیستمحیطی در بخش پاییندست حوضه دارد. | ||
| کلیدواژه‌ها | ||
| پیامدهای محیطی؛ تغییرات کاربری زمین؛ رودخانة زاینده‌رود؛ منابع آب زیرزمینی؛ ناپایداری منابع آب | ||
| عنوان مقاله [English] | ||
| Environmental Consequences of Water Resources Instability in the Zayandeh-Rud Basin | ||
| نویسندگان [English] | ||
| Saeid Salehian1؛ Abdolreza Rahmani Fazli2 | ||
| 1PhD in Geography and Rural Planning, Shahid Beheshti University, Tehran, Iran | ||
| 2Associate professor of Human Geography, Shahid Beheshti University, Tehran, Iran | ||
| چکیده [English] | ||
| Introduction Water has been a major issue for sustainable development in the twenty-first century. It has been so essential that some experts believe that water issues will become a major crisis in the coming years and will result in regional wars and even a world war to gain dominance over water resources. Instability of water resources resulted from drought or water shortage has affected many countries throughout history, especially in the arid regions. This instability had caused many losses and resulted in many severe consequences in the economic, social and environmental sections. Zayandeh-Rud basin in central Iran is highly encountered with water problems. Zayandehrood River originates from Zardkuh Bakhtiary Mountains. It is the most important river of this region for the development of agriculture, a necessary supply for industry and an important supply for drinking water. It can also feed all of the economic activities. Climate instability in recent decades caused increasing pressure on the river by depleting too much water from that to compensate for the water shortage.This pressure led to instability of agricultural water resources and droughts in recent years. This research has tried to study the environmental consequences of water resources instability in the river basin by using analysis of land use changes on two different time periods to assess the changes in the number of wells and the exploitation of the groundwater reservoirs. We have also distributed questionnaires to analyze the effects of drought downstream the basin. Materials and methods In this research, we have applied library research data from book, papers, and basic written resources from National Forest and Land Organization and also Iran Water Resources Management Co. Field survey have also been employed using observation, interview with experts and distribution of the questionnaire. Accordingly, three different methods have been used in this research: Detection of changes in land use: All of the basic data of this section are prepared by “Land Use National Plan” from the “National Forest and Range Organization”. In addition, the experts’ views were used in all of the phases of the research. These maps were created between 2002 and 2013 and their authenticity was confirmed officially. The study area in this research is Zayandeh-Rud River Basin. The zone of the study area was specified based on the defined goals of research and experts’ views. Then, this zone was mapped in “Google Earth” and the study border area of the research was defined from the basic map of National Forest and Land Organization of Iran”. The Study area of the research was divided into three sections. The Land use basic map in “National Forest and Land Organization” had twenty-two items that were merged into nine land-uses. Change detection analysis was conducted by ArcGIS software using Union program and are shown by the maps, tables and descriptive information. Changes in groundwater: The basic data of this section were gathered from “Iran Water Resources Management Co. and Esfahan Regional Water Authority. Changes in the number of wells, Qanats and springs and also the depletion level of the groundwater and also changes in reservoirs of groundwater aquifers in the Zayandeh-Rud basin is processed in two statistical years 2006 and 2011. Consequences of water resources instability on environmental indicators: The statistical population of this research is the villages of a region downstream Zayandeh-Rud basin. The sample was selected based on Cochran formula and in the form of Stratified Probability sampling. The study area downstream the river, from Isfahan city to Gavkhoni marsh, is divided into two parts, Western and Eastern, according to geographic, socio-cultural and political indicators. Out of 33153 rural households, 380 people completed the questionnaires and by removing the incorrect questionnaires our cases became 323 people during the study. The estimated sample of rural settlements is 25 villages. Using the questionnaires in the study area, we can analyze and compare these indices before and after the drought. In the following, average values of research triple indices are analyzed in SPSS software. Then, the results are analyzed by one sample T-test and compared in significant differences of impact of drought in various rural districts with ANOVA test. Results and discussion The comparison of land use maps in 2002 and 2013 of the study basin indicates that dry farming, agriculture, forest, residential settlements and marshland uses have been increased while water surface, canebrake, and deserts as well as rangelands have been decreased during this period. Examination of groundwater indicates that after water sources instability has increased level the exploitation of groundwater aquifers is intensified. It increased in the middle and downstream sections of the basin where the river flow is not permanent. The water shortages by drought are intensified by drilling and exploitation of water from wells. In this context, in 2006-2011 up to 9277 numbers of new wells are drilled. During these five years, average depth of wells is added 4.8 meters and groundwater level has dropped about 5 meters. Analysis of qanat statistics indicate that due to droughts, the qanats water resource is drained almost halved and the number of springs has also declined. To assess the environmental effects of Water Resources instability, we used 13 indices. The highest impact of drought on environmental indicators is in drying qanats, wells and springs, reducing the amount of surface water and increasing the depth of water wells, decline in groundwater levels. The least effect is seen on the indicators as follows: increase in fire in the natural environment of the region and reduction of medicinal plants. The average values of environmental impacts of droughts are 4.24. The results show that there is no significant difference between rural districts in study area in terms of the impact of drought; this means that the rural districts in study area are relatively similar to the impact of the negative consequences of drought in various aspects. Conclusion This process of development is dangerous for human and environmental sustainability in Zayandeh-Rud river basin. The development of the human residence and overuse of the natural resources give rise to the destruction of nature and the natural ecosystem. The disruptions in the ecosystem in such a short time have misbalanced the sustainability of water resources and have negatively affected plant, animal and human ecology. The continued development of residences and the alteration of the land use will heavily damage the sustainability of the environment in Zayande Rood Basin. Increase in exploitation of the aquifers can escalate the cycle of water resources instability, drought and ecological unsustainability. | ||
| کلیدواژه‌ها [English] | ||
| environmental consequences, land use changes, Zayandeh-Rud Basin, Groundwater, instability of water resources | ||
| مراجع | ||
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امینی فسخودی، ع. و میرزایی، م. (1393). پیامدهای بحران کمآبی و خشکشدن زاینده‌رود در مناطق روستایی (مطالعة موردی: جلگة براآن در شرق اصفهان)، توسعة روستایی، 5(2). رضایی، غ.ر. و مأمنپوش، ع.ر. (1387). برآورد ارزش اقتصادی آب کشاورزی در حوضه آبریز زاینده‌رود (مطالعة موردی: محصولات عمدة زراعی)، سومین کنفرانس مدیریت منابع آب ایران، دانشگاه تبریز. ریاحی، و. و پاشازاده، ا. (1392). اثرات اقتصادی و اجتماعی خشکسالی بر نواحی روستایی شهرستان گرمی (مطالعة موردی: دهستان آزادلو)، چشمانداز جغرافیایی در مطالعات انسانی، 8(25): 17ـ37. سالمی، ح. ر. و حیدری، ن. (1385). (گزارش فنی) ارزیابی منابع و مصارف آب در حوضة آبریز زاینده‌رود، انجمن علوم و مهندسی منابع آب، 2(1). سید قاسمی، س. (1385). پیشبینی تغییرات جریان رودخانه تحت تأثیر تغییر اقلیم (مطالعة موردی: حوضة زاینده‌رود، پایاننامة کارشناسی ارشد، دانشکدة مهندسی عمران دانشگاه صنعتی شریف. شرفی، ل. و زرافشانی، ک. (1389). سنجش آسیبپذیری اقتصادی و اجتماعی کشاورزان در برابر خشکسالی، پژوهشهای روستایی، 4: 129ـ154. شرکت آب منطقهای اصفهان (1387). تعیین منابع و مصارف آب در حوضة زاینده‌رود (جلد دهم، سنتز مطالعات)، وزارت نیرو، تهران. علیزاده، ا. (1390). اصول هیدرولوژی کاربردی، مشهد: انتشارات دانشگاه فردوسی مشهد. فارسی، ج. و یوسفی، م (1392). آشکارسازی تغییرات کاربری اراضی با استفاده از دادههای سنجش از دور (مطالعة موردی: دشت بجنورد)، فصلنامة جغرافیا و مطالعات محیطی، 2(7): 95ـ106. فلاحتکار، س. و همکاران (1388). بررسی روند تغییرات پوشش اراضی اصفهان در چهار دهة گذشته با استفاده از سنجش از دور، علوم و فنون کشاورزی و منابع طبیعی، 13(47 الف): 381ـ394. قنبرزاده، ه. و بهنیافر، ا. (1388). پیامدهای اقتصادی خشکسالیهای دورة 1375ـ1385 بر نواحی روستایی دهستان شاندیز شهرستان مشهد، چشمانداز جغرافیایی، 3(9): 139ـ163. کشاورز، م.؛ کرمی، ع. و زمانی، غ. (1389). آسیبپذیری خانوارهای کشاورز از خشکسالی: مطالعة موردی، علوم ترویج و آموزش کشاورزی ایران، 6(2): 15ـ32. کیانی سلمی، ص. (1391). تأثیر بحران منابع آب کشاورزی بر ساختار اقتصادی- اجتماعی روستایی (حوضة رودخانة زاینده‌رود در شرق جلگة اصفهان)، رسالة دکتری جغرافیا و برنامهریزی روستایی، دانشکدة علوم جغرافیایی و برنامهریزی، دانشگاه اصفهان. میرکتولی، ج.؛ حسینی، ع.؛ رضایینیا، ح. و نشاط، ع. (1391). آشکارسازی تغییرات پوششی و کاربری اراضی با رویکرد به مجموعههای فازی (مطالعة موردی: شهر گرگان)، پژوهشهای جغرافیای انسانی، 79: 33ـ54. Abdel Kawy, W.A. and Belal, A.A. (2011). GIS to Assess the Environmental Sensitivity for Desertification in Soil Adjacent to El-Manzala Lake, East of Nile Delta, Egypt, American-Eurasian J. Agric. & Environ. Sci., 10(5): 844-856. Alizadeh, A. (2011). Principles of applied hydrology, University Ferdowsi Mashhad. Amini Faskhoodi, A. and Mirzaei, M. (2008). Management Modelling of Water and Soil Resources and determining the optimal utilization in the agricultural land of East area of Isfahan (Baraan Plain) with using multi-criteria approach of Goal programming, dissertation of Geography and Rural Planning, University of Isfahan. Belay, S.; Amsalu, A. and Abebe, E. (2014). Land Use and Land Cover Changes in Awash National Park, Ethiopia: Impact of Decentralization on the Use and Management of Resources, Open Journal of Ecology, 4: 950-960. Bigas, H. et al. (2012). The Global Water Crisis: Addressing an Urgent Security Issue, Papers for the Inter Action Council, 2011-2012, Hamilton, Canada: UNU-INWEH (United Nations University – Institute for Water, Environment and Health). Esfahan water & wastewater Organization (2008). Determine the sources and uses of water in the Zayandeh-Rood basin (Vol 10. synthesis of studies), Tehran: Ministry of Energy. Falahatkar, S. et al. (2009). Study of the trend of land use changes in the past four decades using remote sensing, Science and Technology of Agriculture and Natural Resources, 13(47a): 381-394. [In Persian]. Farsi, J. and Yousefi, M. (2013). Land Use changes detection using remote sensing data (Case study: Bojnoord Plain), Journal of Geography and Environmental Studies, 7: 95-106. Ghanbar Zadeh, H. and Behnia Far, A. (2009). Economic consequences of droughts in the period 1996-2006 on rural areas of Shandiz District Rural of Mashhad, Geographic landscape. 3(9). 139-163. Gleick, P.H. (1998). Water in crisis: paths to sustainable water USE, Ecological Applications, pp. 571-579, by the Ecological Society of America. Keshavarz, M.; Karami, E. and Zamani, Gh. (2011). Drought vulnerability of farm households: A case study, Journal of Iran Agricultural Extension and Education, 6(2): 15-32. Kiani Salmi, S. (2013). The impact of agricultural water resources crisis on the rural socio-economic structure (Zayandeh-Rud Basin in Eastern of Isfahan Plain). PhD thesis of Geography and Rural Planning. Supervisor: Seidaei and Noori, Faculty of Geographical Sciences and Planning, University of Isfahan. Mir Katooli, J.; Hoseini, A.; Rezaei Nia, H. and Neshat, A. (2012). Detection of land cover change and land use change with approach to fuzzy sets (case study: Gorgan city), Human Geography Research, 79: 54-33. Nwokoro, C. and Dekolo, S.O. (2012). Land use change and environmental sustainability: the case of Lagos Metropolis. The Sustainable City, WIT Transactions on Ecology and the Environment, Vol. 155, WIT Press. Rezaei, Gh. and Maaman Push., A.R. (2008). The estimate economic value of agricultural water in the Zayandeh-rud basin (Case Study: Major agricultural products), The third conference of Iran Water Resources Management, University of Tabriz. Riahi, V. and Pasha Zadeh, A. (2013). Economic and social influences of droughts on rural areas of Geremi town (Case Study: Rural district of Azadlu), Geopolitical landscape in human studies, 25: 17-37. Robb, J. L. (2012), WORLD WAR III: War for Water?,www.omegaletter. com /articles /articles.asp?ArticleID=7462 Salemi, H. and Heidari, N. (2006). Assessment of water resources and uses in the Zayandeh-Rud basin, Association of Water Resources, 2(1). Seiyied Ghasemi, S. (2006). Predicting changes in river flow under the impact of climate change (Case study: Zayandeh-rud basin), Master's thesis. Faculty of Civil Engineering, Sharif University of Technology. Sharafi, L. and Zarafshani, K. (2010). Assessment of economic and social vulnerability farmers against drought, Rural Researches, 4: 129-154. | ||
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