The Impact of Bridges on the Process of Water Turbidity on the Example of Large Lowland Rivers

Abstract

The transformations of river channels as a result of human activity may reflect the level of anthropogenic pressure. Recorded in macroscale, they are indicators of transformations for the larger part of the river basin, while in the microscale they usually refer to its fragment. The human activity that has the strongest influence on the fluvial processes, including suspended sediment transport, is the interference in the riverbed, such as hydrotechnical construction (create of water stages) or transformation of the river banks (concreting of the river banks). The aim of the research was to determine the impact of bridges on the process of water turbidity in the longitudinal profile of large lowland rivers. The research area was the lower reach of Vistula-bridge profiles: Torun, Bydgoszcz, Kiezmark (Poland) and bridge profile on Sukhona-a tributary of the Northern Dvina River near the city of Veliky Ustyug (Russia-Arkhangelsk Oblast). The research conducted in the years 2013-2017 included the measurements of water turbidity in the cross-sections of the above-mentioned rivers. The determinations of water turbidity were carried out using traditional (granulometry analysis) and nephelometric methods (devices: LISST-25X and turbidimeter). The impact of bridges on the variability of water turbidity was determined. The obtained results were related to the variability of depth conditions (bathymetric measurements) and hydrodynamics in the cross-section profile of the channel.

Penilaian Status Kualitas Air Sungai Kapuas Kecil Kalimantan Barat Menggunakan Biota Bentik

“…Rencana pembangunan jalan dan jembatan penghubung yang melintas di atas Sungai Kapuas 185 © 2024, Program Studi Ilmu Lingkungan Sekolah Pascasarjana UNDIP Kecil secara langsung dan tidak langsung juga dapat menyebabkan gangguan terhadap keseimbangan ekosistem riparian sungai ini. Pada tahap konstruksi akan terjadi penurunan kualitas air secara fisika seperti kekeruhan dan Total Dissolved Solid (TDS) (Szatten et al, 2019;Zhu et al, 2014). Perubahan parameter kimia seperti berkurangnya oksigen terlarut dalam air karena berkurangnya cahaya matahari yang dapat masuk ke air akan berdampak pada parameter biologi seperti kematian biota bentik dalam rentang waktu tertentu.…”

Waterfront Developments and Public Space

“…In order to maintain healthy mangroves, it is essential to allow for natural tidal fluctuations. Coastal construction threats include the interruption of tidal and circulation patterns, which in turn affects ecosystems (Shahbudin, Zuhairi et al, 2009;Szatten, Habel et al, 2019). The Eastern Mangroves promenade (Corniche) is one of the most important waterfront parks in Abu Dhabi.…”

LED PEDD Discharge Photometry: Effects of Software Driven Measurements for Sensing Applications

“…Given that the bulk of the reported implementations of PEDD in the literature involve sensing [32], it is considered necessary to do the same here in order to explore the effects of software and timing aspects when measuring a sensory target. Turbidity was chosen for this purpose as it is a very practical and important indicator for water quality [32]-both for environmental monitoring [33][34][35][36][37][38][39][40][41][42] and for drinking water [43][44][45][46]. For water bodies such as rivers and lakes in the environment, turbidity is a measurement of the degree of 'cloudiness' caused by suspended particles with known contributing sources from human activities such as mining, agriculture or construction [38,39].…”

“…Turbidity was chosen for this purpose as it is a very practical and important indicator for water quality [32]-both for environmental monitoring [33][34][35][36][37][38][39][40][41][42] and for drinking water [43][44][45][46]. For water bodies such as rivers and lakes in the environment, turbidity is a measurement of the degree of 'cloudiness' caused by suspended particles with known contributing sources from human activities such as mining, agriculture or construction [38,39]. These suspended particles can absorb sunlight resulting in an increased water temperature and reduce the amount of light at deeper levels, which negatively impacts aquatic life [35].…”