Creation of digital elevation models for river floodplains

Klikunova, Anna; Хоперсков, А. В.

doi:10.18287/1613-0073-2019-2391-275-284

Cited by 8 publications

(8 citation statements)

References 25 publications

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“…1) Проведение моделирования динамики поверхностных вод требует наличия актуальных цифровых моделей рельефа (ЦМР). В данном исследовании был использован разработанный алгоритм построения ЦМР, основанный на итерационном подходе, который использует разнородные источники информации о высотных данных [13]. При выполнении этапа гидрологического исследования специалисты проводят топографическую съемку местности и выполняют построение продольных и поперечных профилей рек.…”

Section: рис 1 схема построения кадастровых карт затопления территорииunclassified

Method for Constructing Cadastral Maps of Flooding of River Valleys Based on Hydrodynamic and Geoinformation Modeling

Klikunova

2023

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The method of creating cadastral maps for flood areas with special conditions of use based on geoinformation and hydrodynamic modeling is described. This approach is used primarily for settlements located in river valleys. The hardware and software complex “EcoGIS-2D-Simulation” is used to conduct simulation experiments to study the dynamics of surface waters in a specific area in the vicinity of a river system. The computational module uses the Combined Smooth Particle Hydrodynamics — Total Variation Diminishing numerical algorithm for parallel integration of shallow water equations on GPUs with CUDA technology. The module for building a digital model of hydrological landscapes is an important component. This module includes a digital elevation model and sets of parameters that determine the hydrological resistance to river flow. The boundaries of the flood areas for some settlements of the Volgograd region at different values of flood probability are constructed.

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Section: рис 1 схема построения кадастровых карт затопления территорииunclassified

Method for Constructing Cadastral Maps of Flooding of River Valleys Based on Hydrodynamic and Geoinformation Modeling

Klikunova

2023

MPCS

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“…We apply shallow water numerical models using high performance GPU codes [4,[26][27][28]. The construction of updated digital terrain models, and above all, the digital elevation model is based on integrating data assimilation from various sources [29,30].…”

Section: Numerical Modeling Of the Hydrological Regime Of The Floodpl...mentioning

confidence: 99%

“…More complex multilayer models with sediment and/or groundwater dynamics include additional matrices defining soil porosity ψ(x, y), aquifer depth b g (x, y), sediment source and sink functions q w (x, y), coefficient of hydraulic conductivity k s (x, y), filtration coefficient k φ (x, y), parameters C J , A J , C Sh defining properties of sedimentation [28]. We use the term "Digital Hydrological Landscape Model" (DHLM proposed by Anna Klikunova [30]), which includes the following set of spatial matrices:…”

Section: Geoinformation Modelingmentioning

confidence: 99%

Modeling the Territorial Structure Dynamics of the Northern Part of the Volga-Akhtuba Floodplain

et al. 2022

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The subject of our study is the tendency to reduce the floodplain area of regulated rivers and its impact on the degradation of the socio-environmental systems in the floodplain. The aim of the work is to create a new approach to the analysis and forecasting of the multidimensional degradation processes of floodplain territories under the influence of natural and technogenic factors. This approach uses methods of hydrodynamic and geoinformation modeling, statistical analysis of observational data and results of high-performance computational experiments. The basis of our approach is the dynamics model of the complex structure of the floodplain. This structure combines the characteristics of the frequency ranges of flooding and the socio-environmental features of various sites (cadastral data of land use). Modeling of the hydrological regime is based on numerical shallow water models. The regression model of the technogenic dynamics of the riverbed allowed us to calculate corrections to the parameters of real floods that imitate the effect of this factor. This made it possible to use digital maps of the modern topography for hydrodynamic modeling and the construction of floods maps for past and future decades. The technological basis of our study is a set of algorithms and software, consisting of three modules. The data module includes, first of all, the cadastres of the territory of the Volga-Akhtuba floodplain (VAF, this floodplain is the interfluve of the Volga and Akhtuba rivers for the last 400 km before flowing into the Caspian Sea), satellite and natural observation data, spatial distributions of parameters of geoinformation and hydrodynamic models. The second module provides the construction of a multilayer digital model of the floodplain area, digital maps of floods and their aggregated characteristics. The third module calculates a complex territorial structure, criteria for the state of the environmental and socio-economic system (ESES) and a forecast of its changes. We have shown that the degradation of the ESES of the northern part of the VAF is caused by the negative dynamics of the hydrological structure of its territory, due to the technogenic influence the hydroelectric power station on the Volga riverbed. This dynamic manifests itself in a decrease in the stable flooded area and an increase in the unflooded and unstable flooded areas. An important result is the forecast of the complex territorial structure and criteria for the state of the interfluve until 2050.

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“…В численной модели 𝑏(𝑥, 𝑦) является сеточной функцией с пространственным разрешением 5 м, построенной по данным дистанционного зондирования Земли SRTM3 и SRTMGL1, топографических карт местности [10]. Русло реки на цифровой модели рельефа (ЦМР) строилось с использованием ГИС Панорама на основе векторизованных береговых линий, высота которых задавалась с использованием данных продольных профилей реки, а также линий фарватера.…”

Section: численная модель затопленияunclassified

Modeling of Flooding of Settlements During the Spring Flood

Klikunova

Dyakonova

Agafonnikova

et al. 2021

MPCS

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The problem of flooding of territories with flood waters for settlements of the Volgograd region is considered. A numerical model of flood water dynamics is constructed, taking into account the topography of the terrain. The simulation is based on two-dimensional shallow water equations. For computational experiments, a parallel implementation of the numerical scheme CSPH-TVD for NVIDIA graphics accelerators with CUDA technology is used. The digital model of the river-bed and floodplain relief is based on spatial data SRTM3 and SRTMGL, topographic maps of the area, longitudinal profiles of rivers. The water flow rates for the Buzuluk and Perevozinka rivers are determined and a hydrograph of the Volga hydroelectric power station is constructed for the given probabilities of exceeding the water level. Flood maps were obtained for the following localities: Novoannisky, Berezovka 1st, kh. Vyazovka. The maximum values of the depths for 1 %, 3 %, 5 %, 10 %, 25 % and 50 % of water security are presented. An analysis of the flood situation was carried out and appropriate engineering and protective measures for settlements were proposed. At maximum flood water levels, residential buildings of kh. Berezovka 1-I are not subject to flooding. In order to minimize the negative impact for the city of Novoanninsky, it is proposed to carry out timely clearing of the river-bed of the Perevozinka river from congestion. To protect from flooding ch. Vyazovka it is recommended to use diversion dyke.

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Creation of digital elevation models for river floodplains

Cited by 8 publications

References 25 publications

Method for Constructing Cadastral Maps of Flooding of River Valleys Based on Hydrodynamic and Geoinformation Modeling

Method for Constructing Cadastral Maps of Flooding of River Valleys Based on Hydrodynamic and Geoinformation Modeling

Modeling the Territorial Structure Dynamics of the Northern Part of the Volga-Akhtuba Floodplain

Modeling of Flooding of Settlements During the Spring Flood

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