This paper focuses on identifying adverse processes of relief formation by ascertaining the transformation mechanisms of floodplain-channel complexes for different types of economic impact. Within the lower reaches if a number of tributaries of the upper reach of the Angara river, the specific features in the modern functioning of valley geosystems undergoing long-term industrial development are considered, based on observations made during 2015–2018. We carried out a landscape-geomorphological analysis of the key areas to identify the main types of channels as well as the most widely occurring landscape complexes within them. A retrospective analysis of the intensification process of environmental management covering a period longer than 350 years identified dominant agricultural activities which we designated as the main transformation factors of valley geosystems. The analysis revealed the mechanisms by which production activities influence the landscapes of floodplain-channel complexes as well as the main relief-forming processes whose intensification is due to the construction and operation of the facilities of the economic infrastructure. Two variants of the conditions for the functioning of the floodplain-channel complexes in the zones of anthropogenic impact are considered. The first variant includes areas with intensive industrial exploitation of the natural resource potential within which there occurs complete or partial destruction of the floodplain-channel complexes accompanied by the manifestation of adverse exogenous processes. Characteristic for the second variant of development of the valley complexes is a minimization of the risks of the manifestation of hazardous relief-formation processes by carrying out environmental measures and constructing engineering protection facilities in the course of gradual long-term development.

中文翻译：

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上安加拉地区洪泛区河道综合体的现代改造因素

本文重点通过确定不同类型经济影响下洪泛区-河道综合体的转化机制来识别救济形成的不利过程。在安加拉河上游的一些支流的下游，根据 2015-2018 年的观察，考虑了经历长期工业发展的山谷地质系统现代功能的具体特征。我们对关键区域进行了景观地貌分析，以确定通道的主要类型以及其中出现最广泛的景观复合体。对超过 350 年的环境管理集约化过程的回顾性分析确定了主要的农业活动，我们将其指定为山谷地质系统的主要转化因素。分析揭示了生产活动对漫滩河道综合体景观的影响机制，以及因经济基础设施建设和运营而加剧的主要地形形成过程。考虑了人为影响区域中漫滩河道复合体功能的两种变体。第一个变体包括对自然资源潜力进行密集工业开发的地区，在这些地区，漫滩河道综合体发生完全或部分破坏，并伴随着不利的外生过程的表现。谷地综合体发展的第二种变体的特点是，在逐步的长期发展过程中，通过实施环境措施和建设工程保护设施，最大限度地减少危险地貌形成过程表现的风险。