Dam Lake Research Articles

Pollution profile, source identification, and risk assessments of persistent organic pollutants (POPs) and toxic elements in the sediments of one of the water supply areas (Sultanbahçedere lake) to Istanbul, Türkiye

This study was done to comprehensively exhibit the pollution level of surface sediments taken from Sultanbahçedere dam lake in terms of some persistent organic pollutants (POPs) and toxic elements, to decide the possible sources of polycyclic aromatic hydrocarbons (PAHs), to perform the ecological and human health risk assessments, and to evaluate the pollution profile with the hierarchically clustered heatmap (HCHM) analysis and principal component analysis (PCA). Naphthalene, Benzo(b)fluoranthene, Fluoranthene, Pyrene for PAHs; p,p-DDE, p,p-DDD, alpha-HCH, p,p-DDT, Endrin for OCPs; hexa and hepta chlorinated congeners accounting for 50.63% and 28.44% for polychlorinated biphenyls (PCBs); 1234678-HpCDD, OCDD for polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs); PCB 118, PCB 105, PCB 167 for dioxin like-PCBs (DL-PCBs) and Al, Fe, Ca for elements were predominant in almost all of the sediments with a few exceptions. S4 site, which is one of the mid-sites of reservoir, has high concentrations in most of these pollutants. According to PAH diagnostic analysis, PAHs in the surface sediments are mostly affected by pyrogenic sources. The concentrations of POPs do not pose any toxic risk to aquatic organisms according to sediment quality guideline (SQG) and the limit values of other countries accepted in the world. Also, since none of the elements exceeded the effect range median (ERM) values, they do not pose a significant toxic risk to aquatic organisms. There is no risk for non-carcinogenic and carcinogenic hazards both for children and for adults considering hazard quotient (HQ), hazard index (HI), and lifetime cancer risk (LCR) values of all pollutants.

Characteristics of Seismogenic Dust Particles from a Mountain and Their Significance for Paleoseismic Records in a Tufa Section: A Case Study of Jiuzhaigou, China

The sedimentary characteristics of the special interlayer contained in the section of the Sparkling Lake dam revealed by the 8 August Jiuzhaigou earthquake in 2017 are obviously different from the tufa in the dam body, and they are considered to be historic flood relics. Based on the study of the particulate matter from the 8 August Jiuzhaigou earthquake, this study combined comparative petrographic, mineralogical, geochemical, and chronological studies of the special interbedded sediments of the Sparkling Lake dam with other genetic samples to obtain homology information and genetic links and to explore the tufa depositional dynamics and earthquake disaster subsidence. The paleoseismic benefit in the discontinuity layer was explored, and the paleoseismic information embedded in the profiles was extracted, providing a new idea for reconstructing the paleoseismic events in the tufa deposition sequence. According to X-ray diffraction, laser particle size analysis, and scanning electron microscope experiments, the particulate matter in the Jiuzhaigou mountains has its own specific mineralogical characteristics. The mineral composition of the particulate matter is basically calcite. The particle size is large, and single particles are mostly angular and subangular. The fracture morphology observed under the single-particle microscope was uneven, showing the characteristics of the dust caused by earthquake disasters. The geochemical analysis data show that the distribution patterns of rare earth elements in different types of particulate matter in the same area have similar characteristics. Moreover, an analysis of the elements Rb, Sr, and Ba shows that the particulate matter in Jiuzhaigou has a strong correlation (R2 = 0.9941), indicating the stability and uniformity of the material source. The source of the particulate matter was limestone of the carbonate strata from the Devonian to the Triassic. Combined with mineralogy and grain size morphology, the interbedded particles in the tufa depositional profile have the potential application of paleoseismic archives to record extreme seismic events. According to the chronological data of the special interlayer sediments in the tufa dam body, the paleoseismic age is inferred to be 1220 ± 30 BP. Therefore, the tufa bedding can be related to the paleoearthquake, and the special interlayer of the tufa section can be used to reconstruct paleoearthquakes.

Deriner Baraj Gölü Zooplanktonu (Artvin-Türkiye)

This study was carried out seasonally at 8 stations determined in Deriner Dam Lake between 2020 and 2021. In order to determine the seasonal zooplankton taxon diversity and richness at the determined stations, the samples were collected in the surface water with a plankton net with a pore size of 55 µm. In the zooplankton distribution of Deriner Dam Lake, more zooplankton was recorded in autumn and spring seasons compared to other seasons in terms of both the number of species and the number of individuals. Although the number of Rotifera species is high, the most common species in terms of individual numbers belong to the Copepoda group. Asplanchna sieboldi from Rotifera, Acanhopdiaptomus denticornis from Copepoda and Daphnia cucullata from Cladocera were the dominant species of their groups

The Present Situation of the Fisheries Sector in Iraq: A Critical Review

In this review, the status of fisheries in Iraq is described. Iraq has two main water resources, the Tigris and Euphrates Rivers, forming a water area of approximately 700,000 hectares. Surface waters are distributed as natural lakes (39%), dam lakes (13.3%), and rivers and their tributaries (3.7%). On the other hand, marshes constitute 44% of the water sources in Iraq. The Iraqi government began recording fish production from wild and aquaculture in 1986. Total fish production from freshwaters in Iraq in 1991 and 1998 were 18,800 and 30,000 tons, respectively. In 2020, the total fish production in Iraq reached to 241,848 tons (Anonymous, 2022a). The bulk of fish production belonged to carps followed by barbs (genus Barbus) and trouts. With respect to capture fishing in Iraq, a variety of trawl nets (single-bag and multi-bag) and gillnets have commonly been used. The 1970s and 1980s were characterized by low consumption of fish meat (i.e., 4.3 kg in 1979), but it has gradually increased over the last years and has reached a remarkable 10 kg per capita in 2020. In this review, freshwater and marine fish species, aquaculture production and wild catch, institutions and centers specialized in researching and developing fisheries, fish meat consumption, problems of the fishing industry and potential solutions to develop the fishing industry in Iraq are outlined. This is the first study on the present status of fisheries in Iraq.

Assessment of dam function deterioration due to landslide-debris flows: numerical modeling based on vegetation distribution scenarios

Landslides are prevalent natural disasters in mountainous regions worldwide, and the debris flows that accompany them are considered a significant cause of topographical changes. Landslide-debris flows cause property damage and casualties if they occur in densely populated areas, such as cities and rural areas. Sediments entering a dam or reservoir lake can compromise the integrity and functionality of the facility. To minimize such damage, this phenomenon should be elucidated through numerical models and quantitative analyses performed. Despite South Korea having approximately 18,000 dams and reservoirs, with approximately 70% of the country being mountainous, research on landslides and debris flows occurring in the dam and reservoir basins remains insufficient. However, such studies are essential for the continuous operation and management of dams/reservoirs. This study focused on analyzing the damage caused by landslide-debris flow events in a dam or reservoir basin. We established different scenarios based on the distribution of vegetation in the basin to determine the impact of vegetation on slope stability and debris flows.

Diversity and taxonomic structure of aquatic macroinvertebrates in a fluvio-lacustrine system in south-west Côte d’Ivoire: The case of the Soubré hydroelectric dam lake

Diversity and taxonomic structure of aquatic macroinvertebrates in a fluvio-lacustrine system in south-west Côte d’Ivoire: The case of the Soubré hydroelectric dam lake

EVALUATION OF AL KABEER AL SHAMALI RIVER'S WATER SUITABILITY FOR DRINKING, BASED ON MODELING AND PSEUDOMONAS AERUGINOSA DETECTION IN SYRIA

Using river water as a source for drinking water is a big challenge. The aim of this study was to determine the fate of Pseudomonas aeruginosa "opportunistic bacteria " in Al Kabeer Al Shamali River and its correlation with drinking water quality (pH, Electrical conductivity, Turbidity, NO3-, NO2-, NH4+ and PO4-3) in three locations; lake inlet " Ghammam Bridge ", artificial (the 16th Tishreen Dam Lake, and the outlet Ain al-Bayda irrigation tunnel). during the period 2018-2019 and 2019-2020. The membrane filtration technique was used to detect Ps. Aeruginosa. Results showed significant differences (p<0.05) between sites for Ps. Aeruginosa, EC, Tur and NO3- . The highest counts for Ps. aeruginosa recorded in Ghammam Bridge water reaching 290000 cfu/100 mL ​​in Jun and correlated with NH4+ (r =0.72). Then counts decreased to 420 cfu/100 ml in May in 16 Tishreen Dam Lake water, due to stratification and environmental stresses. Ps. Aeruginosa counts were higher in lake outlet than 16th Dam Lake and reached 53000 cfu/ 100 ml in July, May due to the release from sediments. Canadian Water Quality Index CCME WQI showed that the lake inlet water is moderate class C (64). The waters of 16th Dam Lake and the outlet are of good grade II B due to sedimentation. These results provide the basis for choosing appropriate sterilization methods to reach health goals to connect this major water source to the drinking water network in Lattakia city

Cheakamus basalt lavas, British Columbia: a Pleistocene record of rapid, continuous eruption within a mountainous drainage system

The Cheakamus basalts are a voluminous (1.65 km3) set of Late Pleistocene, valley-filling lavas erupted from a vent situated near present-day Conflict Lake, in the alpine Callaghan Valley near Whistler, British Columbia. Geochemical and petrographic properties suggest these olivine–plagioclase porphyritic basalt lavas derive from a single batch of magma affected by minor sorting of phenocrysts and xenocrystic plagioclase. Thirty-four sites sampled for paleomagnetic directions record a mean pole direction of 345.2°/73.0° (α95 = 1.3°) and show no statistical variation nor drift with stratigraphic position. These data suggest that the Cheakamus basalt lavas were emplaced in a single paleomagnetic moment—a period of time significantly less than 2000 years. 40Ar/39Ar geochronometry on three lava samples returns a weighted mean age estimate of 15.95 ± 7.9 ka (2σ) and field evidence, including well-glaciated lava flow surfaces overlain by till, indicate the eruption coincided with the early stages of the Fraser glaciation (∼20–18 ka). The lavas preserve features indicative of a landscape hosting diverse and dynamic paleoenvironments. Subaerial eruption of basalt lava filled an ice-free Callaghan Creek drainage system before inundating and damming of the paleo-Cheakamus River creating an upstream rising body of water. Periodic overtopping of the lava dam resulted in syn-eruptive intermittent flooding and overtopping of lavas expressed by discontinuous lenses of interflow sediment. Rare instances of enigmatic cooling columns may also indicate localized ice contact with glaciers that partially filled the Cheakamus Valley. The displacement of the modern Cheakamus River and the long-term damming and formation of Callaghan and Conflict lakes remain direct indicators of the control and impact these basaltic eruptions have had on the geomorphology of the present-day Callaghan and Cheakamus valleys.

Data-poor stock assessment of Narrow-Clawed Crayfish (Pontastacus leptodactylus) in Keban Dam Lake (Türkiye) Using CMSY Method

In this study, as a data-poor fish stock assessment method CMSY was used to assess the current stock status of the Keban reservoir crayfish stock due to not having further data set for using the data-rich models. A total of 27 years catch data (from 1995 to 2021) was used in the analysing process of study. Estimated CMSY model parameters with confidence intervals are as follows: r=0.426 (0.357 - 0.509) year-1, k=146 (118 - 180) ton, MSY=15.7 (13.0 - 18.0) ton, B2021=77.9 (59.5 - 86.7) ton, BMSY=72.8 (58.9 - 89.9) ton, F2021 = 0.295 (0.265 - 0.386) year-1, FMSY = 0.213 (0.179 - 0.254) year-1, B2021/ BMSY = 1.07 (0.818 - 1.190) and F2021/FMSY = 1.38 (1.240 - 1.81). Our study has found that the crayfish population in the Keban reservoir has been in decline due to overfishing since the late 1990s. However, the population has shown signs of recovery since 2013 due to reduced fishing activity. After all overexploitation occurred again in 2021. Our analysis also showed that the current quota of 30.5 tons is significantly higher than the MSY of 15.7 tons. Therefore, it is recommended to reduce the crayfish quota to 15.7 tons in order to sustain the population and prevent further decline.

Parasitological, Bacteriological and Virological Research of Carp (Cyprinus carpio) in a Case in Hirfanlı Dam Lake in Türkiye

The aim of the present study was shedding light on the disease factors underlying mortality event among common carps inhabiting Hirfanlı Dam Lake in Türkiye in spring of the year 2021. For this purpose various parasitological, bacteriological and virological research techniques were employed. Five parasite genera, Dactylogyrus spp., Myxobolus spp., Eimeria spp., Trichodina spp., Diplostomum spp. were isolated from 13 common carps. The opportunistic bacterial pathogen of fresh water fishes Aeromonas hydrophila was also isolated from wounded fish. No viruses were detected. Fungal infections were encountered in the skin lesions of carps. The source of the encountered morbidity and mortality picture among the studied carps points to the combined action of parasitic, bacterial and fungal agents in these fish. Further investigations on seasonal variations of parasitofauna on the lake are needed for better understanding the dynamics in the ecology of the parasites which are hosted by carps in the Hirfanlı Dam Lake.

Post-Little Ice Age glacial lake evolution in Svalbard: inventory of lake changes and lake types

AbstractThe rapid formation of glacial lakes is one of the most conspicuous landscape changes caused by atmospheric warming in glacierised regions. However, relatively little is known about the history and current state of glacial lakes in the High Arctic. This study aims to address this issue by providing the first inventory of glacial lakes in Svalbard, focusing in particular on the post-Little Ice Age evolution of glacial lakes and their typology. To do so, we used aerial photographs and satellite imagery together with archival topographic data from 1936 to 2020. The inventory comprises the development of 566 glacial lakes (146 km2) that were still in direct contact with glaciers during the period 2008–2012. The results show a consistent increase in the total area of glacial lakes from the 1930s to 2020 and suggest an apparent link between climatic and geological factors, and the formation of specific lake dam types: moraine, ice, or bedrock. We also detected 134 glacial lake drainage events that have occurred since the 1930s. This study shows that Svalbard has one of the highest rates of glacial lake development in the world, which is an indicator of the overall dynamics of landscape change in the archipelago in response to climate change.

Determination of the use of Ligula intestinalis as a bioindicator in malathion residues.

In this study, the usability of Ligula intestinalis as a bioindicator for pesticide accumulation was investigated. Two different experiments were designed for the detection of pesticide residues and its withdrawal period. In the first experiment, the accumulation of malathion for 10days was measured in the hybrid fish, Squalius orientalisxAlburnus derjugini sampled from a dam lake. In the next experiment, withdrawal was measured for 15days. The infected and healthy fish in groups exposed malathion and not exposed malathion were sampled at the end of the first experiment. No malathion residue was found in the control group that was not exposed with malathion. For the second experiment, infected and healthy fish from malathion and without malathion groups were sampled to measure the elimination of malathion on the 1st, 4th, 5th, 8th, 12th, and 15th days. At the end of the first experiment, the presence of malathion was not detected in the control group while accumulation was observed in both fish and L. intestinalis in the experimental group. At the end of the second experiment (15th day), the highest residual value was found in L. intestinalis (1.02mg/kg) while it was determined as 0.009mg/kg in infected fish and 0.006mg/kg in uninfected fish. According to the correlation, malathion accumulation was linear between uninfected fish and infected fish. On the other hand, an inverse correlation was found between L. intestinalis and both malathion and control fish. As a result, it was determined that L. intestinalis can be used as a bioindicator in pesticide accumulation and the pesticide is still detectable in the parasite after withdrawal from fish.

Microplastic pollution in two remote rivers of Türkiye.

Microplastic pollution in aquatic ecosystems presents an emerging environmental threat that can have adverse effects on ecology, endanger aquatic species, and result in economic damage. Despite the numerous studies reporting the presence of microplastics in marine environments, research into their presence in freshwater systems or inland waters remains limited. This study aimed to assess the level of microplastic pollution transported by the Munzur and Pülümür Rivers and some small rivers that flow into the Uzunçayır dam lake, which is the confluence of the Munzur and Pülümür Rivers in Türkiye. Samples were collected from 23 stations, with the concentration of microplastics ranging from 0.01 MP/m3 at P-4 station to 28.21 MP/m3 at P-10, a station located near a city. Microplastics comprise four types: fiber, film, fragment, and glitter. The average size of microplastics was 1.46 ± 0.05mm, with the average size of fibers, films, fragments, and glitter-type microplastics being 1.58 ± 0.07mm, 1.23 ± 0.10mm, 1.21 ± 0.11mm, and 0.78 ± 0.16mm, respectively. The most frequent polymers were polyethylene (31.8%), polystyrene (21.1%), and polypropylene (10.5%). Despite being considered remote and less populated rivers compared to other river systems in Türkiye, all sampling sites showed varying concentrations of microplastics.

Seasonal Variation of the Ecological Water Quality in a Drinking Water Supply Dam Lake in Bongouanou (Côte d’Ivoire)

The Ichthyological Index of Wetlands (IIW), for the monitoring of the water quality of Ehuikro Lake in Bongouanou, was established. Monthly, experimental gillnet fisheries were conducted between July 2017 and June 2018 in Lake Ehuikro (Bongouanou, Ivory Coast). The fish collected were identified and counted each month, as well as the physicochemical parameters measured in-situ. A partial canonical correspondence analysis (pCCA) was used to order fish species along the axes according to physicochemical parameters to explain anthropogenic disturbances. It appears from this analysis that the water of Lake Ehuikro is of "good quality" during the rainy season and of "poor quality" during the dry season.

Structure of the Zooplankton Community in Sıddıklı Küçükboğaz Dam Lake, Türkiye: The Importance of Environmental Factors

The zooplankton fauna of Sıddıklı Küçükboğaz Dam Lake, located in Kırşehir city in Turkey, was researched as monthly between September 2015 and August 2016. A total of 24 major zooplankton species was determined. Zooplanktonic organisms were presented by three main groups: Rotifera (75%), Cladocera (21%) and Copepoda (4%). The minimum and maximum number of species were revealed in May (4 species) and April (12 species), respectively. Rotifera was the most abundant taxon dominated mainly by the species Keratella cochlearis, Polyarthra dolichoptera, Asplanchna priodonta and Synchaeta pectinata. Brachionus: Trichocerca quotient value of 1.00 was estimated. This result has clearly showed that the Sıddıklı Küçükboğaz Dam lake is oligotrophic. All species of Rotifera, Cladocera and Copepoda group are new records for this dam lake. The fundamental data of the Sıddıklı Küçükboğaz Dam Lake are provided, and the relationships between zooplankton and environmental parameters have researched in this study. Also, this study was supported by academic basics for monitoring a reservoir in Central Anatolia. Redundancy analysis (RDA) showed that all environmental indicators accounted for 34.1% total variance of zooplankton. Besides, RDA results demonstrated that zooplankton abundance is correlated with biological oxygen demand, water temperature, total suspended solid, ammonium and total ammonia nitrogen.

Automatic Monitoring Alarm Method of Dammed Lake Based on Hybrid Segmentation Algorithm

Mountainous regions are prone to dammed lake disasters due to their rough topography, scant vegetation, and high summer rainfall. By measuring water level variation, monitoring systems can detect dammed lake events when mudslides block rivers or boost water level. Therefore, an automatic monitoring alarm method based on a hybrid segmentation algorithm is proposed. The algorithm uses the k-means clustering algorithm to segment the picture scene in the RGB color space and the region growing algorithm on the image green channel to select the river target from the segmented scene. The pixel water level variation is used to trigger an alarm for the dammed lake event after the water level has been retrieved. In the Yarlung Tsangpo River basin of the Tibet Autonomous Region of China, the proposed automatic lake monitoring system was installed. We pick up data from April to November 2021, during which the river experienced low, high, and low water levels. Unlike conventional region growing algorithms, the algorithm does not rely on engineering knowledge to pick seed point parameters. Using our method, the accuracy rate is 89.29% and the miss rate is 11.76%, which is 29.12% higher and 17.65% lower than the traditional region growing algorithm, respectively. The monitoring results indicate that the proposed method is a highly adaptable and accurate unmanned dammed lake monitoring system.

A Low-Cost, UAV-Based, Methodological Approach for Morphometric Analysis of Belci Lake Dam Breach, Romania

The greatest challenges encountered in geospatial studies are related to the availability, accuracy, relevance and cost of the data used. The main mapping techniques currently employed are based on digital data, which are used to create digital elevation models (DEMs). The aim of the present study is to devise and apply methodologies for the generation and validation of high-resolution mapping materials, usable both for local, large-scale analyses, and for the calculation of certain morphometric parameters based on structure from motion (SFM) techniques, applied to images acquired by means of a drone at low cost. As a case study, the ruins of the Belci dam, located in Romania, were analysed, where, with the help of a drone, GIS measurements were performed on the arborescent vegetation of the study area, and a digital terrain model (DTM) of the dam was generated. The costs of such a methodological endeavour are low, which allows for the repetition of the steps involved in devising the maps necessary for such studies on a weekly, seasonal, or annual basis, or after extreme events (floods, landslides etc.). The cartographic materials created in the present study allowed us to calculate the active section of the left earthfill dike of the Belci dam, as well as the volume of material removed by the flood of 1991.

Combining geophysics, remote sensing and numerical simulation to assess GLOFs: Case study of the Namulacuo Lake in the Southeastern Tibetan Plateau

The current highest glacial lake outburst floods (GLOFs) risk level is centered in the eastern Himalaya. GLOFs represent a serious threat to downstream inhabitants and ecological environment. In the context of climate warming on the Tibetan Plateau, such GLOFs will continue or even intensify in the future. Remote sensing and statistical methods are often used to diagnose glacial lakes with the highest outburst probability. These methods are efficient in large-scale glacial lake risk assessment but do not take into consideration the complexity of specific glacial lake dynamics and triggering factor uncertainty. Therefore, we explored a novel approach to integrate geophysics, remote sensing, and numerical simulation in glacial lake and GLOF disaster chain assessments. In particular, geophysical techniques are rarely applied to the exploration of glacial lakes. The Namulacuo Lake located in the southeastern Tibetan Plateau is considered as the experimental site. The current status of the lake, including landform construction and identifying potential triggering factors, was first investigated. Secondly, the outburst process and disaster chain effect were evaluated by numerical simulation based on the multi-phase modeling frame proposed by Pudasaini and Mergili (2019) implemented in the open source computational tool r.avaflow. The results allowed verifying that the Namulacuo Lake dam was a landslide dam with an obvious layered structure. Also, the piping-induced flood might have more severe consequences than the short-term ultra-high discharge flood caused by surge. The blocking event caused by a surge disappeared faster than that caused by piping. Therefore, this comprehensive diagnostic approach can assist GLOF researchers to increase their understanding of key challenges they are facing regarding GLOF mechanisms.

Glacial Lakes Can Unleash Deadly Deluges. How Risky Are They?

Breaches in glacial lake dams threaten millions around the world, and scientists are investigating how climate change might affect that risk.

Dental paleopathologies in western Anatolian skeletons from the Late Eastern Roman Period (Attepe and Dereköy settlements).

The skeletons investigated herein were dated to the Late Eastern Roman Period, at the time of the golden age under the reign of the Macedonian dynasty ruled between 867 and 1056. In the Kütahya region, which acted as a border and frequently changed between the Eastern Roman and Seljuk states, the oral and dental health of the Attepe and Dereköy populations in this period was differed proportionally. A dam was constructed in Kütahya Province near Kureyşler Village for irrigation purposes. The Attepe settlement (AD 986-1050) and Dereköy necropolis (AD 966-1032) are located within the boundaries of the dam lake. To save the cultural assets in these areas, excavation studies were conducted by the Kütahya Museum in the region in 2014. This study investigated 447 permanent teeth from 34 adult individuals in the Attepe population, and 270 permanent teeth from 17 adult individuals in the Dereköy population dated to the Late Eastern Roman period. When the distribution of dental diseases in the Attepe population was examined, it was determined that 13.77% had caries, 0.81% had periapical lesions, 68.18% had periodontal disease, 13.07% had calculus, 17.98% had hypoplasia, and 22.33% had antemortem tooth loss (AMTL). In the Dereköy population, 12.88% had caries, 2.01% had periapical lesions, 80% had periodontal disease, 3.83% had calculus, 23.28% had hypoplasia, and 5.37% had AMTL. In both populations, the degree of tooth wear was determined as grade 3 and 4. The dental data showed that agricultural-dominated nutrition consumption was effective in the Attepe and Dereköy populations. In both populations, there were significant differences between the amount of caries and calculus (p = 0.00 < 0.05) as well as tooth wear and calculus (p = 0.00 < 0.05). When all these findings were assessed in an integrated fashion, it was possible to understand the features of a village population being involved in agriculture and dominant stock farming in a region in western Anatolia during the 10th-11th centuries, which coped, for the most part, with epidemics and infectious diseases, wars, and perhaps periodic famines.