کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6412366 1332898 2014 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Annual flow duration curves assessment in ephemeral small basins
ترجمه فارسی عنوان
ارزیابی منحنی دوره جریان سالانه در حوضه های کوتاه مدت
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


- We introduce the ModABa, a model for flow duration curves assessment in small river basins.
- The model is calibrated and successfully tested in a Mediterranean ephemeral basin.
- The performances are evaluated by comparing corresponding theoretical and empirical FDCs.
- Model accuracy for the calibration period is confirmed in a different validation period.
- Thanks to its modular structure, the model lends itself to further and future improvements.

SummaryFlow duration curve (FDC) represents a comprehensive signature of temporal runoff variability often used to synthesize catchment rainfall-runoff responses. A new model, the ModABa (MODel for Annual flow duration curves assessment in ephemeral small BAsins), is here introduced. It can be thought as a wide mosaic whose tesserae are frameworks, models or conceptual schemes separately developed in different studies and harmoniously interconnected with the final aim of reproducing the annual FDC in intermittent small catchments. Two separated seasons within the hydrological year are distinguished: a dry season, characterized by absence of streamflow, and a non-zero season. Streamflow is disaggregated into a subsurface component and a surface component that, in turn, is considered formed by two different contributions: impervious runoff and surface runoff from permeable areas induced by heavy rains. The FDCs of the two streamflow components are first separately and differently computed, and then combined to obtain the non-zero FDC. This last, together with the estimated probability of null streamflow, allows the annual FDC assessment through the theory of total probability. The ModABa is here tested on a small Italian catchment and the results show how the model, once calibrated, is able to accurately reproduce the empirical FDC for the analyzed case, starting from easily derivable parameters and commonly available climatic data. In this sense, the model reveals itself as a valid tool, potentially suitable for predictions at ungauged basins in a regionalization framework.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 519, Part A, 27 November 2014, Pages 258-270
نویسندگان
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