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How can stream bank erosion be predicted on small water courses? Verification of BANCS model on the Kubrica watershed
International Journal of Sediment Research ( IF 3.6 ) Pub Date : 2020-11-08 , DOI: 10.1016/j.ijsrc.2020.10.008
Zuzana Allmanová , Mária Vlčková , Martin Jankovský , Michal Allman , Ján Merganič

The current paper deals with the evaluation of the BANCS erosion prediction model and its two components–the Bank Erosion Hazard Index (BEHI) and Near-Bank Stress (NBS) indices. To construct the erosion prediction curves, 18 experimental sections were established on the Kubrica Stream, district of Trenčín, Slovakia. Each section was assessed through the NBS index and BEHI index and real annual bank erosion was measured using erosion toe pins. Subsequently, the relations between the BEHI and real annual bank erosion was assessed through regression and correlation analyses. The relation proved to be moderately strong, with the correlation coefficient (R) reaching 0.47. Further, the relation between the NBS index and real annual bank erosion was evaluated, which was also moderately strong, with R = 0.65. Based on the measured data, two erosion prediction curves were constructed, the first for moderate BEHI, with R = 0.69 and coefficient of determination (R2) of 0.47 and the second for high BEHI with R = 0.74 and R2 = 0.55. The prediction curves were based on data from one year of measurements and can, therefore, be used only for discharges that occurred within that year and in the region where the model was developed. In the current case, according to runoff Curve Numbers (CN), the real culmination discharge was Q = 1.88 m3/s, which is roughly equivalent to 1.5-year recurrence interval flow (Q1.5).



中文翻译:

在小型水道上如何预测河岸侵蚀?库布里卡流域的BANCS模型验证

目前的论文涉及对BANCS侵蚀预测模型及其两个组成部分-银行侵蚀危险指数(BEHI)和近岸压力(NBS)指数的评估。为了构建侵蚀预测曲线,在斯洛伐克特伦钦地区的库布里卡河上建立了18个实验断面。每个部分通过NBS指数和BEHI指数进行评估,并使用侵蚀脚趾钉测量实际的年度河岸侵蚀。随后,通过回归和相关分析评估了BEHI与实际年度银行侵蚀之间的关系。该关系被证明是中等强的,相关系数(R)达到0.47。此外,使用R评估了NBS指数与实际年度银行侵蚀之间的关系,该关系也中等强。 = 0.65。根据测得的数据,构建了两条腐蚀预测曲线,第一条为中等BEHI,R  = 0.69,测定系数(R 2)为0.47,第二条为高BEHI,R  = 0.74和R 2  = 0.55。预测曲线基于一年的测量数据,因此只能用于当年以及模型开发区域内发生的放电。在当前情况下,根据径流曲线编号(CN),实际的高潮排放量为Q  = 1.88 m 3 / s,大约相当于1.5年的复​​发间隔流量(Q 1.5)。

更新日期:2021-01-10
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