A New Method for Computing the Sediment Delivery Ratio for the Hyper-Concentrated Flow Areas of the Loess Plateau, China

IF 6 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Informatics Pub Date : 2021-06-16 DOI:10.3808/jei.202100456

T. H. Li, W. Xie

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引用次数: 3

Abstract

The sediment delivery ratio (SDR) is an important index for understanding sediment erosion, transportation and deposition features in a river basin. Based on the commonly accepted definition of SDR and the characteristics of the sediment delivery process in hyper-concentrated flow areas of the Loess Plateau, China, a new model for computing the SDR is proposed. The model is a functional relation of fractional form, in which the denominator is the surface runoff of the basin, and the numerator is the water volume needed for saturated sediment discharge in the controlling hydrological station at the exit of the basin when the saturated sediment load is equal to the measured sediment load. Using the proposed SDR equation, the long-term series of SDRs in the Yanhe River basin, a typical hyper-concentrated flow basin in the Loess Plateau, were calculated from 1952 to 2010. The results show that the long-term annual average SDR in the Yanhe River basin was 0.92, which is consistent with the results of previous studies; this finding confirms the validity and effectiveness of the method. The proposed method only requires gauge data of sediment concentration, sediment delivery rate, sediment delivery volume, and runoff ratio from hydrological stations, which makes it easy to use, and it can be used to easily estimate soil erosion in the basin.

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黄土高原高集流区输沙比计算新方法

输沙比(SDR)是了解流域泥沙侵蚀、输沙和沉积特征的重要指标。根据目前普遍接受的SDR定义，结合黄土高原高集中流区输沙过程的特点，提出了一种新的SDR计算模型。模型为分数形式的函数关系，其中分母为流域地表径流量，分子为流域出口控制水文站饱和输沙量与实测输沙量相等时的输沙量。利用所提出的SDR方程，计算了1952 - 2010年黄土高原典型高浓度流域延河流域的SDR长期序列。结果表明:延河流域长期年平均SDR为0.92，与前人研究结果一致;这一发现证实了该方法的正确性和有效性。该方法只需要水文站的输沙浓度、输沙速率、输沙量、径流比等计量数据，使用方便，可方便地估算流域土壤侵蚀。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Environmental Informatics ENVIRONMENTAL SCIENCES-

CiteScore

12.40

自引率

2.90%

发文量

审稿时长

24 months

期刊介绍： Journal of Environmental Informatics (JEI) is an international, peer-reviewed, and interdisciplinary publication designed to foster research innovation and discovery on basic science and information technology for addressing various environmental problems. The journal aims to motivate and enhance the integration of science and technology to help develop sustainable solutions that are consensus-oriented, risk-informed, scientifically-based and cost-effective. JEI serves researchers, educators and practitioners who are interested in theoretical and/or applied aspects of environmental science, regardless of disciplinary boundaries. The topics addressed by the journal include: - Planning of energy, environmental and ecological management systems - Simulation, optimization and Environmental decision support - Environmental geomatics - GIS, RS and other spatial information technologies - Informatics for environmental chemistry and biochemistry - Environmental applications of functional materials - Environmental phenomena at atomic, molecular and macromolecular scales - Modeling of chemical, biological and environmental processes - Modeling of biotechnological systems for enhanced pollution mitigation - Computer graphics and visualization for environmental decision support - Artificial intelligence and expert systems for environmental applications - Environmental statistics and risk analysis - Climate modeling, downscaling, impact assessment, and adaptation planning - Other areas of environmental systems science and information technology.