کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8895253 1629900 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dynamics of suspended sediment concentration, flow discharge and sediment particle size interdependency to identify sediment source
ترجمه فارسی عنوان
دینامیک غلظت رسوب معلق، جریان تخلیه و اندازه ذرات رسوب وابستگی متقابل به شناسایی منبع رسوب
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی
Spatiotemporal behavior of sediment yield is a key for proper watershed management. This study analyzed statistical characteristics and trends of suspended sediment concentration (SCS), flow discharge (FD) and sediment particle sizes using data from 24 gage stations scattered throughout the United States. Analysis showed significant time- and location-specific differences of these variables. The median values of SSC, FD and percentage of particle sizes smaller than 63 µm (P63) for all 24 gage stations were found to be 510.236 mg l−1 (right skewed), 45.406 m3 s−1 (left skewed) and 78.648% (right skewed), respectively. Most of the stations exhibited significant trends (P < 0.001) in daily SSC (18 stations; one increasing and 17 decreasing), FD (19 stations; seven increasing and 12 decreasing), and P63 (15 stations; five increasing and 10 decreasing) as well. Further, 46% of the stations exhibited significant trends in all three variables. The wash load significantly contributed (79.085 ± 11.343%) to sediment load recorded at the gage stations. Results of the study can be used for developing best watershed management practices which may call for local or regional planning based on natural (i.e., precipitation amount, type and erosivity, watershed area, and soil erodibility) and human-affected (i.e., land use and hydraulic structures and water resources management) factors governing the study variables.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 554, November 2017, Pages 100-110
نویسندگان
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