کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6410430 1332881 2015 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Impact of spatial and temporal resolution of rainfall inputs on urban hydrodynamic modelling outputs: A multi-catchment investigation
ترجمه فارسی عنوان
تأثیر تفکیک زمانی و فضایی ورودی های بارندگی بر خروجی های مدلسازی هیدرودینامیکی شهری: تحقیق چندزبانه
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


- High space-time resolution rainfall data obtained from polarimetric X-band radar.
- 16 rainfall space-time resolution combinations tested in 7 urban catchments.
- State-of-the-art methodologies make results comparable among catchments and storms.
- Relationship between catchment size, rainfall resolution and model output quality.
- Identification of critical space-time resolution rainfall input for urban hydrology.

SummaryUrban catchments are typically characterised by high spatial variability and fast runoff processes resulting in short response times. Hydrological analysis of such catchments requires high resolution precipitation and catchment information to properly represent catchment response. This study investigated the impact of rainfall input resolution on the outputs of detailed hydrodynamic models of seven urban catchments in North-West Europe. The aim was to identify critical rainfall resolutions for urban catchments to properly characterise catchment response. Nine storm events measured by a dual-polarimetric X-band weather radar, located in the Cabauw Experimental Site for Atmospheric Research (CESAR) of the Netherlands, were selected for analysis. Based on the original radar estimates, at 100 m and 1 min resolutions, 15 different combinations of coarser spatial and temporal resolutions, up to 3000 m and 10 min, were generated. These estimates were then applied to the operational semi-distributed hydrodynamic models of the urban catchments, all of which have similar size (between 3 and 8 km2), but different morphological, hydrological and hydraulic characteristics. When doing so, methodologies for standardising model outputs and making results comparable were implemented. Results were analysed in the light of storm and catchment characteristics. Three main features were observed in the results: (1) the impact of rainfall input resolution decreases rapidly as catchment drainage area increases; (2) in general, variations in temporal resolution of rainfall inputs affect hydrodynamic modelling results more strongly than variations in spatial resolution; (3) there is a strong interaction between the spatial and temporal resolution of rainfall input estimates. Based upon these results, methods to quantify the impact of rainfall input resolution as a function of catchment size and spatial-temporal characteristics of storms are proposed and discussed.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 531, Part 2, December 2015, Pages 389-407
نویسندگان
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