Study on the correlation between river network patterns and topography in the Haihe River basin

IF 2.3 3区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Frontiers in Earth Science Pub Date : 2023-03-20 DOI:10.3389/feart.2023.1124124

Zhang Xingyuan, Li Fawen

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Abstract

In recent decades, the river network patterns (RNPs) in China’s Haihe River basin have changed dramatically, and the topology of the river network has become increasingly complex. It is important to quantitatively study the correlation between river network patterns and topography (CRNPT) and the changes in the correlation. In this paper, the Haihe River basin was spatially gridded (4 km × 4 km), and different geomorphological areas were extracted for a multiarea study. We selected topographic and river network indicators and proposed new indicators to characterize regional topographic ‘stressfulness’ and then used redundancy analysis for correlation studies. The results showed that the variance of RNP explained by topography was 53.39%. The combined contribution of the topographic wetness index (TWI) and topographic wetness stress index (TSI) ranged from 35.66% to 78.29% in multiple areas, and the TSI showed stronger explanatory power. The regional effect of the CRNPT was significant, with mountains and transition areas having higher effects than plain areas. Compared to the natural river network, the CRNPT of the current river network was significantly lower. Among the RNP indicators, the artificial channel proportion ( P a c ) had the highest proportion of variance, and the CRNPT was strongly influenced by artificial channels. Artificial channels changed the consistency of topography with the RNP and reduced the topographic interpretation of the RNP, which may weaken the stability and hydrological connectivity of the river network. The variation in interpretation was related to the distribution of artificial channels, which showed a logarithmic function relationship between them.

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海河流域河网格局与地形的相关性研究

近几十年来，中国海河流域的河网格局发生了巨大变化，河网拓扑结构日益复杂。定量研究河网格局与地形（CRNPT）之间的相关性及其相关性的变化具有重要意义。本文对海河流域进行了空间网格划分（4km×4km），提取了不同的地貌区域进行了多区域研究。我们选择了地形和河网指标，并提出了新的指标来表征区域地形的“应力”，然后使用冗余分析进行相关性研究。结果表明，地形对RNP的解释方差为53.39%，地形湿度指数（TWI）和地形湿度应力指数（TSI）在多个区域的综合贡献率在35.66%至78.29%之间，TSI具有较强的解释力。《不扩散核武器条约》的区域影响很大，山区和过渡地区的影响高于平原地区。与天然河网相比，现有河网的CRNPT明显较低。在RNP指标中，人工通道比例（P a c）的方差比例最高，CRNPT受到人工通道的强烈影响。人工河道改变了地形与RNP的一致性，减少了对RNP的地形解释，这可能会削弱河网的稳定性和水文连通性。解释的变化与人工通道的分布有关，人工通道与人工通道之间呈对数函数关系。

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

Frontiers in Earth Science Earth and Planetary Sciences-General Earth and Planetary Sciences

CiteScore

3.50

自引率

10.30%

发文量

2076

审稿时长

12 weeks

期刊介绍： Frontiers in Earth Science is an open-access journal that aims to bring together and publish on a single platform the best research dedicated to our planet. This platform hosts the rapidly growing and continuously expanding domains in Earth Science, involving the lithosphere (including the geosciences spectrum), the hydrosphere (including marine geosciences and hydrology, complementing the existing Frontiers journal on Marine Science) and the atmosphere (including meteorology and climatology). As such, Frontiers in Earth Science focuses on the countless processes operating within and among the major spheres constituting our planet. In turn, the understanding of these processes provides the theoretical background to better use the available resources and to face the major environmental challenges (including earthquakes, tsunamis, eruptions, floods, landslides, climate changes, extreme meteorological events): this is where interdependent processes meet, requiring a holistic view to better live on and with our planet. The journal welcomes outstanding contributions in any domain of Earth Science. The open-access model developed by Frontiers offers a fast, efficient, timely and dynamic alternative to traditional publication formats. The journal has 20 specialty sections at the first tier, each acting as an independent journal with a full editorial board. The traditional peer-review process is adapted to guarantee fairness and efficiency using a thorough paperless process, with real-time author-reviewer-editor interactions, collaborative reviewer mandates to maximize quality, and reviewer disclosure after article acceptance. While maintaining a rigorous peer-review, this system allows for a process whereby accepted articles are published online on average 90 days after submission. General Commentary articles as well as Book Reviews in Frontiers in Earth Science are only accepted upon invitation.