کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4576918 1629989 2012 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Gauge based precipitation estimation and associated model and product uncertainties
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Gauge based precipitation estimation and associated model and product uncertainties
چکیده انگلیسی

SummaryEstimating areal precipitation and quantifying the associated uncertainties are important for both hydrological research and water resource management. However, many, if not all, precipitation products provide only the precipitation at reasonable spatial scales without uncertainty attached. In this paper, we promote a double smoothing technique to derive the precipitation amounts at small grid size based on gauge observations and then propose a bootstrap method to quantify the rainfall model estimation uncertainty (the uncertainty of rainfall estimation by a given model; here our model is double smoothing) by the traditional bootstrap for parameter uncertainty and the rainfall product uncertainty in term of prediction. As the residuals by the direct use of smoothing approach are heterogeneous, making the direct use of bootstrapping method invalid, we use an empirical transformation to stabilise the residuals. Furthermore, by using bootstrapping method, we can easily upscale the precipitation and the associate uncertainty to any required scales. The product is easy to use in research and practice. We demonstrate our methods by applying it to Murray Darling Basin in the eastern Australia.


► We derived a gauge-only rainfall product for regions with reasonable gauge coverage.
► We derived uncertainty estimation for the product.
► We derived a upscaling method from grid to catchment scales.
► We applied the methods to Murray–Darling Basin of Australia, which is a important region in Australia.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volumes 444–445, 11 June 2012, Pages 100–112
نویسندگان
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