کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6784443 | 1432332 | 2018 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Estimating submarine groundwater discharge and associated nutrient inputs into Daya Bay during spring using radium isotopes
ترجمه فارسی عنوان
برآورد تخلیه آبهای زیرزمینی و ورود مواد غذایی مرتبط به آن در خلیج دایا در فصل بهار با استفاده از ایزوتوپهای رادیوم
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
Daya Bay, a semi-enclosed bay in the South China Sea, is well known for its aquaculture, agriculture, and tourism. In recent years, many environmental problems have emerged, such as the frequent (almost yearly) occurrence of harmful algal blooms and red tides. Therefore, investigations of submarine groundwater discharge (SGD) and associated nutrient inputs to this bay have important theoretical and practical significance to the protection of the ecological system. Such a study was conducted using short-lived radium isotopes 223Ra and 224Ra. The estimated SGD fluxes were 2.89Â ÃÂ 107Â m3/d and 3.05Â ÃÂ 107Â m3/d based on 223Ra and 224Ra, respectively. The average SGD flux was about 35 times greater than that of all the local rivers. The SGD-associated dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorus (DIP) fluxes ranged from 1.95Â ÃÂ 106 to 2.06Â ÃÂ 106Â mol/d and from 5.72Â ÃÂ 104 to 6.04Â ÃÂ 104Â mol/d, respectively. The average ratio of DIN to DIP fluxes in SGD was 34, much higher than that in local rivers (about 6.46), and about twice as large as the Redfield ratio (16). Our results indicate that SGD is a significant source of nutrients to the bay and may cause frequent occurrence of harmful algal blooms. This study provides baseline data for evaluating potential environmental effects due to urbanization and economic growth in this region.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Science and Engineering - Volume 11, Issue 2, April 2018, Pages 120-130
Journal: Water Science and Engineering - Volume 11, Issue 2, April 2018, Pages 120-130
نویسندگان
Jing-yan Gao, Xue-jing Wang, Yan Zhang, Hai-long Li,