Feasibility and uncertainty of using conceptual rainfall-runoff models in design flood estimation

Feasibility and uncertainty of using conceptual rainfall-runoff models in design flood estimation
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在设计洪水估算中使用概念降雨径流模型的可行性和不确定性

DOI:
10.2166/nh.2015.069
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发表时间:
2016-08
期刊:
Hydrology Research: An International Journal
影响因子:
--
通讯作者:
Hou Yu-Kun
Hou Yu-Kun
中科院分区:
其他
文献类型:
--
作者:
Zeng Qiang;Chen Hua;Xu Chong-Yu;Jie Meng-Xuan;Hou Yu-Kun

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水文模型的开发用于不同的目的,包括洪水预报,设计洪水估计,水资源评估,气候变化和土地利用变化的影响研究等。在这项研究中,两个确定性集总模型,新安江(XAJ)模型和水文Byrans Vattenbalansavdelning(HBV)模型,在设计洪水估计的适用性和不确定性在中国南方的一个数据丰富的流域。然后,使用广义似然不确定性估计(GLUE)框架评估由模型等效性和校准数据周期引起的估计设计洪水的不确定性。结果表明:(1)XAJ模型可能高估设计洪水,而HBV模型可能低估设计洪水;(2)模型参数的等同性对设计洪水估算结果有显著影响;(3)在相同的校正期长度下,模型校正所用的数据期对设计洪水估算结果有显著影响;(4)15-20年的校正资料是研究区校正两个模型的必要和充分的。
Hydrological models are developed for different purposes including flood forecasting, design flood estimation, water resources assessment, and impact study of climate change and land use change, etc. In this study, applicability and uncertainty of two deterministic lumped models, the Xinanjiang (XAJ) model and the Hydrologiska Byrans Vattenbalansavdelning (HBV) model, in design flood estimation are evaluated in a data rich catchment in southern China. Uncertainties of the estimated design flood caused by model equifinality and calibration data period are then assessed using the generalized likelihood uncertainty estimation (GLUE) framework. The results show that: (1) the XAJ model is likely to overestimate the design flood while HBV model underestimates the design flood; (2) the model parameter equifinality has significant impact on the design flood estimation results; (3) with the same length of calibration period, the results of design flood estimation are significantly influenced by which period of the data is used for model calibration; and (4) 15–20 years of calibration data are suggested to be necessary and sufficient for calibrating the two models in the study area.
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