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Abstract <p>The village of Palana is situated on the northeastern coast of the Sea of Okhotsk at the mouth of the Palana River. Palana is an important fishing center of Kamchatka krai. The river mouth is blocked by an accumulative barrier bar, the morphodynamics of which makes the navigation rather difficult. This article deals with possible improvements of navigable conditions in the mouth. The study is based on analysis of archival and published materials, space images, and the results of our fieldwork and modeling. Three types of morphodynamic evolution have been identified, namely: (1) consecutive elongation of the spit to the south–southwest at an average of 100–150 m/year; (2) spit increase in the same direction by 400–600 m or more per year; and (3) relative stability of the spit. Elongation of the spit to the south–southwest is a natural phenomenon. The maximum length of the spit was 2.8 km. On rare occasions (several times in a century), the mouth spit was broken and the channel straightened due to natural reasons, most likely, a significant increase in river runoff during seasonal floods. In addition, the mouth of the Palana River has been artificially straightened several times. After natural or anthropogenic breakthrough of the spit, the development cycle restarts in the river mouth. Sediments for the elongation of the spit come from the underwater coastal slope and active cliffs on the abrasion segment of the coast to the north of the river mouth; the role of river sediment is insignificant. When the front of the spit gets closer to rocks and stones to the south of the river mouth, it threatens the local navigation. The only way to settle the problem is to control the length of the spit. For this purpose, recommendations with due account of material and technical resources available in the settlement and the practical experience have been developed. We have specified the prerequisites for hydrotechnical measures, the most favorable time for their implementation, and the method of constructing a new breach.</p>

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Dynamics of Coastal Accumulative Forms and Experience of Improving Navigation Conditions at the Palana River Mouth (Northwestern Kamchatka)

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • S. L. Gorin,
  • D. V. Korzinin,
  • D. I. Shkolniy,
  • P. M. Belova

摘要

Abstract

The village of Palana is situated on the northeastern coast of the Sea of Okhotsk at the mouth of the Palana River. Palana is an important fishing center of Kamchatka krai. The river mouth is blocked by an accumulative barrier bar, the morphodynamics of which makes the navigation rather difficult. This article deals with possible improvements of navigable conditions in the mouth. The study is based on analysis of archival and published materials, space images, and the results of our fieldwork and modeling. Three types of morphodynamic evolution have been identified, namely: (1) consecutive elongation of the spit to the south–southwest at an average of 100–150 m/year; (2) spit increase in the same direction by 400–600 m or more per year; and (3) relative stability of the spit. Elongation of the spit to the south–southwest is a natural phenomenon. The maximum length of the spit was 2.8 km. On rare occasions (several times in a century), the mouth spit was broken and the channel straightened due to natural reasons, most likely, a significant increase in river runoff during seasonal floods. In addition, the mouth of the Palana River has been artificially straightened several times. After natural or anthropogenic breakthrough of the spit, the development cycle restarts in the river mouth. Sediments for the elongation of the spit come from the underwater coastal slope and active cliffs on the abrasion segment of the coast to the north of the river mouth; the role of river sediment is insignificant. When the front of the spit gets closer to rocks and stones to the south of the river mouth, it threatens the local navigation. The only way to settle the problem is to control the length of the spit. For this purpose, recommendations with due account of material and technical resources available in the settlement and the practical experience have been developed. We have specified the prerequisites for hydrotechnical measures, the most favorable time for their implementation, and the method of constructing a new breach.