نشریه علوم زمین خوارزمی

نشریه علوم زمین خوارزمی

بررسی کیفیت منابع آب سطحی حوضه آبریز سد کوثر استان کهگیلویه و بویر احمد

مقالات آماده انتشار
نویسندگان
طالب مرادی نژاد
نصرالله کلانتری
علی افروس
امیر صابری نصر
هادی محمدی
چکیده
سد مخزنی کوثر یکی از سدهای بزرگ کشور می باشد و به دلیل تامین آب بخش قابل توجهی از مناطق جنوب و جنوب غربی کشور از اهمیت بسزایی برخوردار است. هدف از انجام این مطالعات ارزیابی کیفیت منابع آب زیر حوضه های منتهی به سد کوثر می باشد. برای نیل به این هدف از چهار سر شاخه ورودی به سد کوثر نمونه برداری از 18 ایستگاه جهت آنالیز شیمیایی و بیوشیمیایی از دی ماه 1401 تا مهرماه 1402 انجام شد و جمعاً 72 نمونه برداشت شده است. نتایج داده های بدست آمده نشان می دهد که بیشترین هدایت الکتریکی، PH ، کلسیم، منیزیم، سدیم، پتاسیم، بی کربنات، سولفات، کلرید نیترات، اکسیژن محلول، اکسیژن مورد نیاز بیولوژیکی و پتانسیل اکسیداسیون و احیا به ترتیب6536 میکروموس، 71/8، 23، 7، 33، 22/0، 6، 17، 44 (برحسب میلی اکی واوالانت بر لیتر)، 27، 12، 27 (بر حسب میلی گرم در لیتر) و 35 (میلی ولت)، بوده است. کمترین مقدار به ترتیب412 (میکروموس)، 4/7، 4/2، 2/1، 19/0، 01/0، 75/2، 76/0، 15/0(برحسب میلی اکی والنت بر لیتر)، 2/4، 17/0، 14/0 (بر حسب میلی گرم در لیتر) و 229 (میلی ولت) می باشد. داده های بدست آمده نشان می دهد که تغییرات غلظت پارامترهای شیمیایی و بیوشیمیایی قابل توجه می باشد و ناشی از عوامل طبیعی و انسان زاد است. میانگین هدایت الکتریکی، نیترات، اکسیژن محلول، اکسیژن مورد نیاز بیوشیمیایی آب مخزن سد در چهار دوره نمونه برداری به ترتیب1448 میکروموس بر سانتیمتر9/5، 2/8، 5/5 میلی گرم در لیتر آب بوده است. دامنه تغییرات مقدار پارامترهای کیفی آب نسبتاٌ قابل ملاحظه است که نشان دهنده تأثیر هم‌ زمان عوامل طبیعی و انسان‌زاد بر کیفیت آب های ورودی به سد کوثر است. تغییرات غلظت نیترات،BOD وDO نشان‌دهنده اثر فعالیت‌های انسان‌زاد، می‌باشد.

عنوان مقاله English

Assessment of the surface water quality resources of the Kowsar Dam watershed, Kogiloueh and Boyer Ahmad province

نویسندگان English

taleb moradinejad
nasrollah kalantari
ali afroos
amir saberinasr
hadi mohammadi
چکیده English

The Kowsar Dam is one of the great reservoir and is important due to supply of water for a large part in the south and southwest of the country. The aim of this study was water quality evaluation of the Kowsar Dam watershed. To achieve this goal, eighteen stations were selected for sampling along four tributaries of the Kowsar Dam and totally 72 samples were collected for analysis of chemical and biochemical parameters from January 2023 to October 2023. The maximum value of the physicochemical parameters i.e. electrical conductivity (EC), pH, Ca, Mg, Na, K, HCO3, SO4, Cl, NO3, O2, BOD and ORP were 6536(micromohos/cm), 8/71, 23, 7, 33, 6,17,44(meq/l), 27,12, 27(mg/l) and 35(mv), respectively. The lowest values were 412(micromohos/cm), 7/4, 2/4, 1/2, 0/19, 0/01, 2/75, 0/76, 0/15 (meq/l), 4/2, 0/17, 0/14(mg/l) and -229(mv) respectively. The average value of EC, NO3, DO, and BOD were 1448 (micromohos/cm), 5/9, 8/2 and 5/5 (mg/l), respectively for the reservoir water in the four periods of sampling. The variation domains of the qualitative parameters were quite significant indicating the natural and anthropogenic components effect, on input waters into the Kowsar Dam and variations of NO3, BOD and DO concentration represent anthropogenic impacts. In order to understand the conditions governing quality of water resources, multi variation statistics methods, such as HCA (Hierarchy Clustering Analysis), FA (Factor Analysis) were accounted.

کلیدواژه‌ها English

Water resources quality
Kausar Dam
Correlation matrix
Rotation matrix
Scree diagram
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نشریه علوم زمین خوارزمی

مقالات آماده انتشار، پذیرفته شده
انتشار آنلاین از 01 اردیبهشت 1404