کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5752190 1620132 2017 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Geospatial tools effectively estimate nonexceedance probabilities of daily streamflow at ungauged and intermittently gauged locations in Ohio
ترجمه فارسی عنوان
ابزارهای جغرافیایی به طور موثری احتمالهای احتمال انتقال جریان روزانه را در مکان های ناشناس و متناوب در اوهایو اندازه گیری می کنند.
کلمات کلیدی
پیش بینی در حوضه های ناهموار، فرکانس جریان کریگینگ هیدرولوژیکی،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی
Several methods for estimating nonexceedance probabilities of daily mean streamflows are explored, including single-index methodologies (nearest-neighboring index) and geospatial tools (kriging and topological kriging). These methods were evaluated by conducting leave-one-out cross-validations based on analyses of nearly 7 years of daily streamflow data from 79 unregulated streamgages in Ohio and neighboring states. The pooled, ordinary kriging model, with a median Nash-Sutcliffe performance of 0.87, was superior to the single-site index methods, though there was some bias in the tails of the probability distribution. Incorporating network structure through topological kriging did not improve performance. The pooled, ordinary kriging model was applied to 118 locations without systematic streamgaging across Ohio where instantaneous streamflow measurements had been made concurrent with water-quality sampling on at least 3 separate days. Spearman rank correlations between estimated nonexceedance probabilities and measured streamflows were high, with a median value of 0.76. In consideration of application, the degree of regulation in a set of sample sites helped to specify the streamgages required to implement kriging approaches successfully.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology: Regional Studies - Volume 13, October 2017, Pages 208-221
نویسندگان
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