Impact Of Mozhaysk Dam On The Moscow River Sediment Transport
Sediments are an essential part of the aquatic environment that define its transformation and development. The construction of dams results in severe changes in sediment fluxes. This study aims to assess how the sediment load of the upper Moskva River is affected by the Mozhaysk Dam flow regulation...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Lomonosov Moscow State University
2020-12-01
|
| Series: | Geography, Environment, Sustainability |
| Subjects: | |
| Online Access: | https://ges.rgo.ru/jour/article/view/1541 |
| _version_ | 1827063375068135424 |
|---|---|
| author | Dmitriy I. Sokolov Oxana N. Erina Maria A. Tereshina Valeriy V. Puklakov |
| author_facet | Dmitriy I. Sokolov Oxana N. Erina Maria A. Tereshina Valeriy V. Puklakov |
| author_sort | Dmitriy I. Sokolov |
| collection | DOAJ |
| description | Sediments are an essential part of the aquatic environment that define its transformation and development. The construction of dams results in severe changes in sediment fluxes. This study aims to assess how the sediment load of the upper Moskva River is affected by the Mozhaysk Dam flow regulation and to estimate its dynamics over the years of the reservoir’s existence. Our analysis of the 1968, 2012 and 2016 detailed field data shows a 20-40% decrease in the proportion of the spring flood in the annual sediment load into the reservoir, which is caused by changes in the streamflow regime of the inflowing rivers. The peak suspended sediment concentrations have decreased 5- to 10-fold, likely due to a significant decline in the watershed’s cultivated land area, which caused a decrease in the erosion rate. In the Moskva River below the dam, the seasonal dynamics of the suspended sediment concentration no longer corresponds to the natural regime. The annual suspended load of the Moskva River below the Mozhaysk Reservoir decreased up to 9-fold. The sediment retention in the reservoir has dropped from 90% to 70-85% and is to some extent restored by an outflow of the particulate organic matter produced in the reservoir. We also described the relationships between water turbidity and suspended sediment concentration of the reservoir’s tributaries, which allow for the first time to estimate the sediment load with higher accuracy than was previously possible. |
| first_indexed | 2024-04-10T02:32:14Z |
| format | Article |
| id | doaj.art-24fe1c320dd54978ae17832850726c67 |
| institution | Directory Open Access Journal |
| issn | 2071-9388 2542-1565 |
| language | English |
| last_indexed | 2025-03-19T22:30:15Z |
| publishDate | 2020-12-01 |
| publisher | Lomonosov Moscow State University |
| record_format | Article |
| series | Geography, Environment, Sustainability |
| spelling | doaj.art-24fe1c320dd54978ae17832850726c672024-10-17T12:30:10ZengLomonosov Moscow State UniversityGeography, Environment, Sustainability2071-93882542-15652020-12-01134243110.24057/2071-9388-2019-150506Impact Of Mozhaysk Dam On The Moscow River Sediment TransportDmitriy I. Sokolov0Oxana N. Erina1Maria A. Tereshina2Valeriy V. Puklakov3Lomonosov Moscow State UniversityLomonosov Moscow State UniversityLomonosov Moscow State UniversityLomonosov Moscow State UniversitySediments are an essential part of the aquatic environment that define its transformation and development. The construction of dams results in severe changes in sediment fluxes. This study aims to assess how the sediment load of the upper Moskva River is affected by the Mozhaysk Dam flow regulation and to estimate its dynamics over the years of the reservoir’s existence. Our analysis of the 1968, 2012 and 2016 detailed field data shows a 20-40% decrease in the proportion of the spring flood in the annual sediment load into the reservoir, which is caused by changes in the streamflow regime of the inflowing rivers. The peak suspended sediment concentrations have decreased 5- to 10-fold, likely due to a significant decline in the watershed’s cultivated land area, which caused a decrease in the erosion rate. In the Moskva River below the dam, the seasonal dynamics of the suspended sediment concentration no longer corresponds to the natural regime. The annual suspended load of the Moskva River below the Mozhaysk Reservoir decreased up to 9-fold. The sediment retention in the reservoir has dropped from 90% to 70-85% and is to some extent restored by an outflow of the particulate organic matter produced in the reservoir. We also described the relationships between water turbidity and suspended sediment concentration of the reservoir’s tributaries, which allow for the first time to estimate the sediment load with higher accuracy than was previously possible.https://ges.rgo.ru/jour/article/view/1541mozhaysk damsediment loadsuspended sediment concentrationreservoir |
| spellingShingle | Dmitriy I. Sokolov Oxana N. Erina Maria A. Tereshina Valeriy V. Puklakov Impact Of Mozhaysk Dam On The Moscow River Sediment Transport Geography, Environment, Sustainability mozhaysk dam sediment load suspended sediment concentration reservoir |
| title | Impact Of Mozhaysk Dam On The Moscow River Sediment Transport |
| title_full | Impact Of Mozhaysk Dam On The Moscow River Sediment Transport |
| title_fullStr | Impact Of Mozhaysk Dam On The Moscow River Sediment Transport |
| title_full_unstemmed | Impact Of Mozhaysk Dam On The Moscow River Sediment Transport |
| title_short | Impact Of Mozhaysk Dam On The Moscow River Sediment Transport |
| title_sort | impact of mozhaysk dam on the moscow river sediment transport |
| topic | mozhaysk dam sediment load suspended sediment concentration reservoir |
| url | https://ges.rgo.ru/jour/article/view/1541 |
| work_keys_str_mv | AT dmitriyisokolov impactofmozhayskdamonthemoscowriversedimenttransport AT oxananerina impactofmozhayskdamonthemoscowriversedimenttransport AT mariaatereshina impactofmozhayskdamonthemoscowriversedimenttransport AT valeriyvpuklakov impactofmozhayskdamonthemoscowriversedimenttransport |