شناسایی مکان‏ های دارای پتانسیل استحصال آب باران حوضۀ آبخیز سراب صیدعلی الشتر با استفاده از دو روش NRCS- CN و سیستم پشتیبانی تصمیم‏ گیری (DSS) مبتنی بر GIS

نوع مقاله : پژوهشی


1 دانشجوی کارشناسی ارشد مهندسی آبخیزداری، دانشکدۀ کشاورزی و منابع طبیعی دانشگاه لرستان

2 استاد‏یار گروه مهندسی آبخیزداری، دانشکدۀ کشاورزی و منابع طبیعی دانشگاه لرستان


جمع‏آوری رواناب برای به‌ حداقل‌رساندن تلفات و تقویت ذخایر آبی در حوضه‏های آبخیز‌ استفاده می‌شود. کشورهایی که مانند برخی مناطق ایران کمبود آب دارند، با توزیع نامناسب بارندگی مواجه‌اند. با گسترش مصرف منابع آبی، استفادۀ اصولی از رواناب به‌دست‌آمده از بارش می‏تواند در جهت رفع مشکل کمبود آب مؤثر واقع شود. به‏منظور برآورد رواناب در حوضه‏های آبخیز روش‏های تجربی و مدل‏های ریاضی مختلفی وجود دارد. یکی از این مدل‏ها، مدل شمارۀ منحنی (NRCS - CN) است که در تحقیق حاضر اساس تولید نقشۀ ارتفاع رواناب است. هدف از این تحقیق شناسایی مناطق دارای پتانسیل جمع‏آوری آب باران (برای تغذیۀ مصنوعی آبخوان به‌روش حوضچۀ تغذیه و ذخیرۀ سطحی به‌روش بانکت‌بندی و تراس‏بندی) در حوضۀ آبخیز سراب صید‌علی به‌روش (NRCS - CN) و DSS است. به این صورت که در محیط نرم‏افزار GIS بعد از تهیۀ نقشۀ رواناب، از 6 لایۀ اطلاعاتی دیگر شامل زمین‏شناسی، گسل، تراکم آبراهه‏ها، کاربری اراضی، بافت خاک و شیب و از 2 روش If و WOA به‌منظور وزن‌دهی، رتبه‌دهی و تلفیق 7 لایۀ موجود استفاده شد و از بین نقشه‏های نهایی به‌دست‌آمده از دو روش یادشده، نقشه‏های با صحت بیشتر انتخاب و با در‌نظر‌گرفتن مسائل اقتصادی – اجتماعی با 3 نقشۀ فاصله از اراضی آبی، اراضی دیم و مناطق مسکونی در قالب سیستم پشتیبانی تصمیم‏گیری (DSS) تلفیق شدند و نقشه‏های نهایی با عنوان نقشۀ مناطق مستعد تغذیۀ مصنوعی و نقشۀ مناطق مستعد ذخیرۀ سطحی آب باران به‌دست آمد.



عنوان مقاله [English]

Identifying potential rainwater harvesting sites in Sarab Seid Ali watershed of Alashtar usingtwo GIS based methods of NRCS-CN and decision support system (DSS)

نویسندگان [English]

  • Parvin Noormohammadi 1
  • Ali Haghizadeh 2
  • Naser Tahmasbipoor 2
  • Hosein Zeinivand 2
چکیده [English]

Runoff Collect used for to minimize losses and strengthen water resources in watersheds.Countries like some areas of Iran are facing to water scarcity, faced with Unsuitable distribution of rainfall. By expanding the use of water sources, using the principles of runoff from rainfall can be effective to solve the problem of water shortage.In order to estimate the runoff in watershedsthere are several experimental methods and mathematical models. One of these models is Curve Number Model (NRCS) that in this study, is production base of runoff maps. The purpose of this research is Identifying potential rainwater harvesting sites (Artificial recharge of aquifers by percolation ponds and surface storage of runoff by Gradin andterracing) in Sarab Seid ali watershed of Alashtar by (NRCS - CN) method. this means that in the GIS software environment after mapping the runoff used of other six layers of information contain: Geology , Fault , Drainage density , Land use , Soil texture and slope and used ofIF , WOAmethods forweighting, rating and integrating existing7Layerand from the final maps of the two methods select maps with more accurate and with considering economic – Social issuesIncorporation with 3 Map ofdistance from irrigated lands , drylands and residential areas in the form of a decision support system (DSS) and The final maps of suitable areas for artificial recharge and surface storage of rainwater became harvest.

کلیدواژه‌ها [English]

  • rainwater harvesting
  • Seid Ali Watershed
  • (NRCS- CN)
  • (DSS)
  • GIS

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