Feasibility of Using Sentinel-3 in Estimating Lake Nasser Water Depths

2021 ◽  
Author(s):  
Marwa Khairy ◽  
Hickmat Hossen ◽  
Mohamed Elsahabi ◽  
Shenouda Ghaly ◽  
Andrea Scozzari ◽  
...  
Keyword(s):  
Water Level ◽  
Water Depth ◽  
Water Body ◽  
Optical Data ◽  
Inland Water ◽  
Depth Data ◽  
Nasser Lake ◽  
Inland Water Body ◽  
The Relationship

<p><strong>Abstract</strong>  After the construction of the Grand Ethiopian Renaissance Dam (GERD), Nasser Lake (NL)became one of the most challenging hot spots at both local and global level. It is one of the biggest manmade reservoirs in the world and the most important in Egypt. It is created  in the southern part of the Nile River in Upper Egypt after the construction of Aswan High Dam (AHD). The water level in NL might fluctuate between 160 to 182 m above the mean sea level. Monitoring NL  water depth is an expensive and time-consuming activity. This work investigates the possibility to use information from the Sentinel missions to estimate the depth of NL as an inland water body, in the frame of estimating storage variations from satellite measurements. In this preliminary study, we investigated the relationship between the radiance /reflectance of optical imagery from two instruments SLSTR and OLCI instruments hosted by the Sentinel-3A platform and in situ water depth data using the Lyzenga equation. The results  indictaed  that there was a reasonable correlation between Sentinel-3 optical data and in situ water depth data. Also, Heron's formula was used to estimate water storage variations of NL with limited in situ data. In addition, equations governing the relationship between water level and both surface area and water volume were worked out. This study is in the framework of a bilateral project between ASRT of Egypt and CNR of Italy which is still running.</p><p> </p><p><strong>Keywords</strong>: Sentinel, SLSTR, OLCI, Inland water body, Nasser Lake, Egypt, Water Depth, GERD, AHD, Egypt</p>

Bathymetry Estimation using Multispectral Imagery over an Inland Water Body – Vembanad Lake, Kerala, India

2020 ◽  
Vol 89 (sp1) ◽  
pp. 126
Author(s):  
Kumari Rupam ◽  
Vincent Arul Ferrer ◽  
Kizhur Kandathil Ramachandran
Keyword(s):  
Water Body ◽  
Multispectral Imagery ◽  
Inland Water ◽  
Inland Water Body

scholarly journals Dimensionless Assessment Method of Landslide Dam Formation Caused by Tributary Debris Flow Events

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Kun-Ting Chen ◽  
Xiao-Qing Chen ◽  
Gui-Sheng Hu ◽  
Yu-Shu Kuo ◽  
Yan-Rong Huang ◽  
...  
Keyword(s):  
Debris Flow ◽  
Water Depth ◽  
Debris Flows ◽  
Landslide Dam ◽  
Assessment Method ◽  
Main Stream ◽  
Deposition Thickness ◽  
The Relationship ◽  
Prepared Response

In this study, we develop a dimensionless assessment method to evaluate landslide dam formation by considering the relationship between the run-out distance of a tributary debris flow and the width of the main stream, deposition thickness of the tributary debris flow, and the water depth of the main stream. Based on the theory of debris flow run-out distance and fan formation, landslide dam formation may result from a tributary debris flow as a result of two concurrent formation processes: (1) the run-out distance of the tributary debris flow must be greater than the width of the main stream, and (2) the minimum deposition thickness of the tributary debris flow must be higher than the in situ water depth of the main stream. At the confluence, one of four types of depositional scenarios may result: (1) the tributary debris flow enters into the main stream and forms a landslide dam; (2) the tributary debris flow enters into the main stream but overflow occurs, thus preventing complete blockage of the main stream; (3) the tributary debris flow enters into the main stream, does not reach the far bank, and sediment remains partially above the water elevation of the main stream; or (4) the tributary debris flow enters into the main stream, does not reach the far bank, and sediment is fully submerged in the main stream. This method was applied to the analysis of 11 tributary debris flow events during Typhoon Morakot, and the results indicate that the dimensionless assessment method can be used to estimate potential areas of landslide dam formation caused by tributary debris flows. Based on this method, government authorities can determine potential areas of landslide dam formation caused by debris flows and mitigate possible disasters accordingly through a properly prepared response plan, especially for early identification.

Results of the Global WaterPack: a novel product to assess inland water body dynamics on a daily basis

2015 ◽  
Vol 6 (1) ◽  
pp. 78-87 ◽  
Author(s):  
Igor Klein ◽  
Andreas Dietz ◽  
Ursula Gessner ◽  
Stefan Dech ◽  
Claudia Kuenzer
Keyword(s):  
Water Body ◽  
Daily Basis ◽  
Inland Water ◽  
Body Dynamics ◽  
Inland Water Body

SARAL/AltiKa Altimetry Data for Monitoring of Inland Water Body: a Case Study of Mayurakshi Reservoir, India

2016 ◽  
Vol 44 (5) ◽  
pp. 797-802 ◽  
Author(s):  
A. Sai krishnaveni ◽  
V. M. Chowdary ◽  
D. Dutta ◽  
J. R. Sharma ◽  
V. K. Dadhwal
Keyword(s):  
Water Body ◽  
Altimetry Data ◽  
Inland Water ◽  
Inland Water Body

The Influence of Reservoir Level Plummeting on Slope Stability Reinforced by Pile

2013 ◽  
Vol 281 ◽  
pp. 615-619
Author(s):  
Jian Qing Jiang ◽  
Guo Shao Su ◽  
Liu Bin Yan ◽  
Lei Ding
Keyword(s):  
Water Level ◽  
Water Depth ◽  
Influence Factors ◽  
Reduction Principle ◽  
Reinforcement Effect ◽  
Reservoir Level ◽  
Study Results ◽  
Before And After ◽  
Height Change ◽  
The Relationship

Lagrange finite difference method basing on the strength reduction principle is applied to simulate the reinforcement effect of anti-slide pile for slope under water plummeting condition. The influence factors of reinforcement effect including speed of water level plummeting, the ratio between water depth and slope height, the location of pile is discussed. The study results show that the higher speed of water level plummeting may result in less value of slope safety factor. Moreover, the relationship between the ratio between water depth and slope height change significantly before and after reinforcement under water level plummeting condition. The study also reveal that the location of pile have important influence on the reinforcement effect.

scholarly journals Inland Water Bodies Monitoring using Satellite Altimetry over Indian Region

2014 ◽  
Vol XL-8 ◽  
pp. 1035-1041 ◽  
Author(s):  
S. Chander ◽  
D. Ganguly ◽  
A. K. Dubey ◽  
P. K. Gupta ◽  
R. P. Singh ◽  
...  
Keyword(s):  
Water Level ◽  
Satellite Altimetry ◽  
Tide Gauge ◽  
Water Bodies ◽  
High Rate ◽  
Inland Water ◽  
Gps Survey ◽  
Level Information ◽  
Inland Water Bodies

Satellite altimetry for inland water applications has evolved from investigation of water height retrieval to monitoring since last two decades. Altimetry derived reservoir/ river levels can subsequently be used to deal with key inland water resources problems such as flood, rating curve generation for remote locations, reservoir operations, and calibration of river/lake models. In this work 29 inland water bodies were selected over Indian region to monitor from satellite altimetry. First cut selection of potential water bodies was based on availability of altimeter tracks and geographic locations. Then feasibility study was carried out to check the potential of availability of in-situ measurement and scope of GPS survey for final selection. An algorithm is proposed and tested for the waterlevel retrieval over the Ukai Reservoir which fulfil all the necessary requirements. The methodology is based on averaged high rate waveforms, modified retracker and range corrections. The results were then validated with the GPS survey and in-situ tide gauge dataset. SARAL derived water-level information for six different retrackers were compared with the in-situ tide-gauge dataset installed close to the Ukai Dam. Averaged high rate waveforms were analysed for better performance, i.e. single 40 Hz, and multiple 40-Hz. A field trip was conducted on 17th January 2014, same day on the SARAL pass, using two Dual frequency GPS instruments. New improved retracker work best with overall RMSE within the range of 8 cm. The results supports that AltiKa dataset can be utilized for more accurate water level information over inland water bodies.

scholarly journals Sharp changes in lake-levels preconditioning seismogenic mass failures in the Dead Sea

2020 ◽  
Author(s):  
Yin Lu ◽  
Amotz Agnon ◽  
Shmuel Marco ◽  
Revital Bookman ◽  
Nicolas Waldmann ◽  
...  
Keyword(s):  
Water Level ◽  
Lake Level ◽  
High Amplitude ◽  
Dead Sea ◽  
Age Dating ◽  
Lake Level Changes ◽  
Mass Failure ◽  
The Dead ◽  
The Relationship

<p>Subaqueous mass failures that comprise slides, slumps and debris flows are a major process that transport sediments from the continental shelf and upper slope to the deep basins (both oceans and lacustrine settings). They are often viewed together with other natural hazards such as earthquakes, and can have serious socioeconomic consequences. It is increasingly important to understand the relationship between mass failures and climate-driven factors such as changes in water-level. Despite extensive marine investigations on this topic world-wide, the relationship between changes in water-level and mass failures is still highly disputed. This is due largely to the significant uncertainties in age dating and different potential triggers and preconditioning factors of mass failure events from different geological settings. Here, we present a 70 kyr-long record of mass failure from the Dead Sea Basin center (ICDP Core 5017-1). This sedimentary sequence has been dated in high accuracy (±0.6 kyr) and has similar responses to climate forcing. Moreover, the mass failure record is interpreted to be controlled by a single trigger mechanism (i.e. seismicity).<br>Based on the recent detailed study on the sedimentological signature of seismic shaking in the Dead Sea center, these seismogenic mass failures (seismites) account only for a part of the whole seismites catalog, suggesting that mass failure follows only part of seismic shaking irrespective of intensities of the shaking. This is evidenced by the common absence of mass failures following the in situ developed and preserved seismites (e.g., the in situ folded layer and intraclast breccias layer) which represent different intensities of seismic shaking. This feature implies that some non-seismic factor(s) must have preconditioned for the seismogenic mass failures in the Dead Sea center.<br>Our observations reveal decoupling between change in sedimentation rates and occurrence probability of these seismogenic mass failures, thus suggesting that a change in sedimentation rate is not the preconditioning factor for the failure events. While 79% of seismogenic mass failure events occurred during lake-level rise/drop in contrast to 21% events occurred in the quiescent intervals between. Our dataset implies that seismogenic mass failures can occur at any lake-level state, but are more likely to occur during lake-level rise/drop due to the instability of the basin margins. In addition, the seismogenic mass failures occurred more frequently during glacials (characterized by highstand and high-amplitude lake-level changes) than during interglacials, as a result of the morphologic characteristics of the lake margin slopes and different lithologies (e.g. halite) influences which are both connected to the glacial-interglacial lake-level changes.</p>

scholarly journals DAHITI – an innovative approach for estimating water level time series over inland waters using multi-mission satellite altimetry

2015 ◽  
Vol 19 (10) ◽  
pp. 4345-4364 ◽  
Author(s):  
C. Schwatke ◽  
D. Dettmering ◽  
W. Bosch ◽  
F. Seitz
Keyword(s):  
Time Series ◽  
Water Level ◽  
Satellite Altimetry ◽  
Water Levels ◽  
Altimeter Data ◽  
Inland Waters ◽  
New Approach ◽  
Inland Water ◽  
Rivers And Lakes

Abstract. Satellite altimetry has been designed for sea level monitoring over open ocean areas. However, for some years, this technology has also been used to retrieve water levels from reservoirs, wetlands and in general any inland water body, although the radar altimetry technique has been especially applied to rivers and lakes. In this paper, a new approach for the estimation of inland water level time series is described. It is used for the computation of time series of rivers and lakes available through the web service "Database for Hydrological Time Series over Inland Waters" (DAHITI). The new method is based on an extended outlier rejection and a Kalman filter approach incorporating cross-calibrated multi-mission altimeter data from Envisat, ERS-2, Jason-1, Jason-2, TOPEX/Poseidon, and SARAL/AltiKa, including their uncertainties. The paper presents water level time series for a variety of lakes and rivers in North and South America featuring different characteristics such as shape, lake extent, river width, and data coverage. A comprehensive validation is performed by comparisons with in situ gauge data and results from external inland altimeter databases. The new approach yields rms differences with respect to in situ data between 4 and 36 cm for lakes and 8 and 114 cm for rivers. For most study cases, more accurate height information than from other available altimeter databases can be achieved.

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