Pub Date : 2023-07-24DOI: 10.1080/02626667.2023.2229817
Rahim Najafi Tireh Shabankareh, M. J. Abedini
ABSTRACT Reliable estimation of design rainfall in time and space can play a significant role in reducing flood-related losses. However, many parts of the world suffer from a lack of dense raingauge networks. Under this condition, the use of satellite-based data can be an alternative solution. In this research, using data from a dense ground-based raingauge network and Integrated Multi-satellitE Retrievals for GPM (IMERG) satellite-based precipitation product, the performance of a probability matching method for satellite-based extreme values has been investigated. The results indicate that the correction model, especially at shorter durations, is able to reduce the error of extreme values of raw satellite-based estimates, and its performance is not affected significantly by the density of the available raingauge network. In conclusion, implementation of the proposed method in poorly gauged regions can play an effective role in providing a reliable estimate of the design rainfall and eventually reducing the financial losses caused by floods.
{"title":"Implementation of a probability matching method in developing intensity–duration–frequency relationships for sub-daily durations using IMERG satellite-based data","authors":"Rahim Najafi Tireh Shabankareh, M. J. Abedini","doi":"10.1080/02626667.2023.2229817","DOIUrl":"https://doi.org/10.1080/02626667.2023.2229817","url":null,"abstract":"ABSTRACT Reliable estimation of design rainfall in time and space can play a significant role in reducing flood-related losses. However, many parts of the world suffer from a lack of dense raingauge networks. Under this condition, the use of satellite-based data can be an alternative solution. In this research, using data from a dense ground-based raingauge network and Integrated Multi-satellitE Retrievals for GPM (IMERG) satellite-based precipitation product, the performance of a probability matching method for satellite-based extreme values has been investigated. The results indicate that the correction model, especially at shorter durations, is able to reduce the error of extreme values of raw satellite-based estimates, and its performance is not affected significantly by the density of the available raingauge network. In conclusion, implementation of the proposed method in poorly gauged regions can play an effective role in providing a reliable estimate of the design rainfall and eventually reducing the financial losses caused by floods.","PeriodicalId":55042,"journal":{"name":"Hydrological Sciences Journal-Journal Des Sciences Hydrologiques","volume":"68 1","pages":"1648 - 1662"},"PeriodicalIF":3.5,"publicationDate":"2023-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47469658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-24DOI: 10.1080/02626667.2023.2230217
Pengchao Sun, Changsheng Guo, D. Wei
ABSTRACT Chile has unevenly distributed water resources, limited water level stations and earthquake-prone geological conditions, making it difficult to accurately and comprehensively monitor Chile’s terrestrial water storage (TWS) variations. The Gravity Recovery and Climate Experiment (GRACE) has been widely used to estimate TWS variations. This study uses GRACE solutions and a method of eliminating earthquake effects to estimate TWS variations. The estimation results with earthquake effects deducted show that the rate of TWS variation in Chile is generally a decreasing trend of −0.16 ± 0.096 cm year−1. Furthermore, in the target period, precipitation mainly decreased and evapotranspiration increased. Correlation coefficients between TWS variations, precipitation and evapotranspiration are less than 0.4, suggesting that the factors in TWS are more complex. Temperature also shows an increasing trend of 0.06°C year−1 in Chile. This information will help to understand the characteristics of the TWS variation in Chile and its response to climate change.
{"title":"Estimating terrestrial water storage variations in Chile with the effects of earthquakes deducted","authors":"Pengchao Sun, Changsheng Guo, D. Wei","doi":"10.1080/02626667.2023.2230217","DOIUrl":"https://doi.org/10.1080/02626667.2023.2230217","url":null,"abstract":"ABSTRACT Chile has unevenly distributed water resources, limited water level stations and earthquake-prone geological conditions, making it difficult to accurately and comprehensively monitor Chile’s terrestrial water storage (TWS) variations. The Gravity Recovery and Climate Experiment (GRACE) has been widely used to estimate TWS variations. This study uses GRACE solutions and a method of eliminating earthquake effects to estimate TWS variations. The estimation results with earthquake effects deducted show that the rate of TWS variation in Chile is generally a decreasing trend of −0.16 ± 0.096 cm year−1. Furthermore, in the target period, precipitation mainly decreased and evapotranspiration increased. Correlation coefficients between TWS variations, precipitation and evapotranspiration are less than 0.4, suggesting that the factors in TWS are more complex. Temperature also shows an increasing trend of 0.06°C year−1 in Chile. This information will help to understand the characteristics of the TWS variation in Chile and its response to climate change.","PeriodicalId":55042,"journal":{"name":"Hydrological Sciences Journal-Journal Des Sciences Hydrologiques","volume":"68 1","pages":"1663 - 1679"},"PeriodicalIF":3.5,"publicationDate":"2023-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46883535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-24DOI: 10.1080/02626667.2023.2224921
Han Chen, J. Huang, S. S. Dash, E. McBean, Vijay Singh, Hansheng Li, Yizhao Wei, Pengwei Zhang, Ziqi Zhou
ABSTRACT It is well known that the dry/wet boundaries of land surface temperature fractional vegetation coverage (LSTfc) trapezoid framework vary linearly with vegetation coverage (fc). In this study, the theoretical end-members algorithm is modified to continuously estimate the dry/wet end-members under varying vegetation conditions, causing the theoretical dry/wet boundaries to become non-linear. The findings revealed that the non-linear dry/wet boundaries were generally below the conventional linear dry/wet boundaries. Furthermore, the non-linear boundary scheme adopted herein provided better performance in estimating the latent heat flux (LE) and vegetation latent heat flux fraction (LEv/LE) compared to the linear boundary scheme. The parametric schemes of aerodynamic and thermodynamic roughness length and the aerodynamic resistance were the major drivers that result in dry/wet boundaries characteristics being highly non-linear. This study enhanced the physical process description in the LST-fc trapezoid framework and improved the prediction accuracy of regional LE and its components.
{"title":"A non-linear theoretical dry/wet boundary-based two-source trapezoid model for estimation of land surface evapotranspiration","authors":"Han Chen, J. Huang, S. S. Dash, E. McBean, Vijay Singh, Hansheng Li, Yizhao Wei, Pengwei Zhang, Ziqi Zhou","doi":"10.1080/02626667.2023.2224921","DOIUrl":"https://doi.org/10.1080/02626667.2023.2224921","url":null,"abstract":"ABSTRACT It is well known that the dry/wet boundaries of land surface temperature fractional vegetation coverage (LSTfc) trapezoid framework vary linearly with vegetation coverage (fc). In this study, the theoretical end-members algorithm is modified to continuously estimate the dry/wet end-members under varying vegetation conditions, causing the theoretical dry/wet boundaries to become non-linear. The findings revealed that the non-linear dry/wet boundaries were generally below the conventional linear dry/wet boundaries. Furthermore, the non-linear boundary scheme adopted herein provided better performance in estimating the latent heat flux (LE) and vegetation latent heat flux fraction (LEv/LE) compared to the linear boundary scheme. The parametric schemes of aerodynamic and thermodynamic roughness length and the aerodynamic resistance were the major drivers that result in dry/wet boundaries characteristics being highly non-linear. This study enhanced the physical process description in the LST-fc trapezoid framework and improved the prediction accuracy of regional LE and its components.","PeriodicalId":55042,"journal":{"name":"Hydrological Sciences Journal-Journal Des Sciences Hydrologiques","volume":"68 1","pages":"1591 - 1609"},"PeriodicalIF":3.5,"publicationDate":"2023-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49234653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-24DOI: 10.1080/02626667.2023.2234893
Cyril Thébault, C. Perrin, V. Andréassian, G. Thirel, S. Legrand, O. Delaigue
ABSTRACT Many sources of error in hydroclimatic data can affect hydrological modelling, yet the impact of streamflow data quality is poorly quantified. This work aims to investigate whether inconsistencies found in streamflow time series commonly available for hydrological studies (typically in national streamflow archives) have an impact on the efficiency and the parameter estimates of rainfall–runoff models. Hydroclimatic data were gathered at the hourly time step over the period 1998–2018 for a set of 30 catchments in France. Hydrological modelling was carried out with the lumped conceptual GR5H (standing for modèle du Génie Rural à 5 paramètres Horaire, i.e. Hourly 5-parameter rural engineering model) model. A typology of “realistic” suspicious streamflow was established to set up several error models in order to corrupt the data. Our results suggest that common suspicious streamflow data do not have a strong impact on model efficiency and parameter estimates overall, but may be an important source of instability and lack of robustness when working on a single catchment.
{"title":"Impact of suspicious streamflow data on the efficiency and parameter estimates of rainfall–runoff models","authors":"Cyril Thébault, C. Perrin, V. Andréassian, G. Thirel, S. Legrand, O. Delaigue","doi":"10.1080/02626667.2023.2234893","DOIUrl":"https://doi.org/10.1080/02626667.2023.2234893","url":null,"abstract":"ABSTRACT Many sources of error in hydroclimatic data can affect hydrological modelling, yet the impact of streamflow data quality is poorly quantified. This work aims to investigate whether inconsistencies found in streamflow time series commonly available for hydrological studies (typically in national streamflow archives) have an impact on the efficiency and the parameter estimates of rainfall–runoff models. Hydroclimatic data were gathered at the hourly time step over the period 1998–2018 for a set of 30 catchments in France. Hydrological modelling was carried out with the lumped conceptual GR5H (standing for modèle du Génie Rural à 5 paramètres Horaire, i.e. Hourly 5-parameter rural engineering model) model. A typology of “realistic” suspicious streamflow was established to set up several error models in order to corrupt the data. Our results suggest that common suspicious streamflow data do not have a strong impact on model efficiency and parameter estimates overall, but may be an important source of instability and lack of robustness when working on a single catchment.","PeriodicalId":55042,"journal":{"name":"Hydrological Sciences Journal-Journal Des Sciences Hydrologiques","volume":"68 1","pages":"1627 - 1647"},"PeriodicalIF":3.5,"publicationDate":"2023-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43779576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-24DOI: 10.1080/02626667.2023.2236593
M. Bentivenga, J. de Vente, S. Giano, G. Prosser, M. Piccarreta
ABSTRACT This paper investigates how hydrological drought affected suspended sediment yield (SSY) in the Mediterranean Ofanto River basin, southern Italy, and in its five sub-basins from 1951 to 1989. The Standardized Precipitation Evaporation Index over a scale of 12 months (SPEI12) has been used to compute the hydrological drought in the investigated span of time. SPEI12, mean and maximum monthly discharge (Qmean and Qmax), monthly rainfall erosivity, monthly simple daily intensity index and monthly SSY were used to assess the relationships between dry/wet cycles, streamflow and SSY through the Pearson correlation matrix. Qmean and Qmax are significantly correlated with SSY, while SPEI12 and rainfall intensity do not show good correlation with SSY. Furthermore, from the overall analyses it emerges that sediment yield estimations were higher mainly during the wet period following a period of drought or during a drought period.
{"title":"Suspended sediment yield under alternating dry/wet cycles in a Mediterranean river catchment: the case of the Ofanto River, southern Italy","authors":"M. Bentivenga, J. de Vente, S. Giano, G. Prosser, M. Piccarreta","doi":"10.1080/02626667.2023.2236593","DOIUrl":"https://doi.org/10.1080/02626667.2023.2236593","url":null,"abstract":"ABSTRACT This paper investigates how hydrological drought affected suspended sediment yield (SSY) in the Mediterranean Ofanto River basin, southern Italy, and in its five sub-basins from 1951 to 1989. The Standardized Precipitation Evaporation Index over a scale of 12 months (SPEI12) has been used to compute the hydrological drought in the investigated span of time. SPEI12, mean and maximum monthly discharge (Qmean and Qmax), monthly rainfall erosivity, monthly simple daily intensity index and monthly SSY were used to assess the relationships between dry/wet cycles, streamflow and SSY through the Pearson correlation matrix. Qmean and Qmax are significantly correlated with SSY, while SPEI12 and rainfall intensity do not show good correlation with SSY. Furthermore, from the overall analyses it emerges that sediment yield estimations were higher mainly during the wet period following a period of drought or during a drought period.","PeriodicalId":55042,"journal":{"name":"Hydrological Sciences Journal-Journal Des Sciences Hydrologiques","volume":"68 1","pages":"1809 - 1825"},"PeriodicalIF":3.5,"publicationDate":"2023-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41743319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-13DOI: 10.1080/02626667.2023.2236089
Saman Solati, M. Vaghefi, G. Ahmadi
ABSTRACT The effect of unsteady currents on scour at piers was investigated. The tests were run for nine pier shapes, three installation positions along a 180° bend, four flood durations, and four ratios of rising limb to flood duration for the 100-minute flood durations. Overall, including seven tests performed in the bend without piers, 196 tests were performed. The flow rapidity ranged from the movement threshold to live bed situations. The results indicated that the deepest scour-hole in front of the piers with different shapes was a function of flood duration and the ratio of ascending branch to descending branch had little effect on the final maximum scour-hole depth around the pier. The scour-hole volume is affected by the nose and the cross-sectional shape of the pier. For the rectangular pier, the scour-hole volume is greater than that of the other piers. The average shape coefficient was calculated.
{"title":"Scour pattern around a pier in a 180° sharp bend: influence of pier shape under unsteady currents","authors":"Saman Solati, M. Vaghefi, G. Ahmadi","doi":"10.1080/02626667.2023.2236089","DOIUrl":"https://doi.org/10.1080/02626667.2023.2236089","url":null,"abstract":"ABSTRACT The effect of unsteady currents on scour at piers was investigated. The tests were run for nine pier shapes, three installation positions along a 180° bend, four flood durations, and four ratios of rising limb to flood duration for the 100-minute flood durations. Overall, including seven tests performed in the bend without piers, 196 tests were performed. The flow rapidity ranged from the movement threshold to live bed situations. The results indicated that the deepest scour-hole in front of the piers with different shapes was a function of flood duration and the ratio of ascending branch to descending branch had little effect on the final maximum scour-hole depth around the pier. The scour-hole volume is affected by the nose and the cross-sectional shape of the pier. For the rectangular pier, the scour-hole volume is greater than that of the other piers. The average shape coefficient was calculated.","PeriodicalId":55042,"journal":{"name":"Hydrological Sciences Journal-Journal Des Sciences Hydrologiques","volume":"68 1","pages":"1711 - 1723"},"PeriodicalIF":3.5,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47952985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-12DOI: 10.1080/02626667.2023.2236092
Nehar Mandal, Kironmala Chanda
ABSTRACT The relative influence of climate and catchment characteristics to the variations in runoff in five Indian river basins is assessed using the climate elasticity approach based on the Budyko hypothesis. From 1980 to 1999, catchment characteristics are found to be the main contributor to runoff variation for all of the basins except Upper Mahanadi sub-basin, where climatic factors are the major contributor. Among the climatic factors, runoff is more responsive to changes in precipitation than to changes in potential evapotranspiration. The mean contribution of climate (catchment) to runoff variation is largest at the Cauvery (Krishna) basin. The findings may be useful in planning sustainable water resources infrastructure. Investigation of the relationship between runoff changes in the basins and their land use and land cover changes, as well as the vegetation index, adds to the novelty and usefulness of the study.
{"title":"Contribution of climate and catchment characteristics to runoff variations in Indian river basins: a climate elasticity approach","authors":"Nehar Mandal, Kironmala Chanda","doi":"10.1080/02626667.2023.2236092","DOIUrl":"https://doi.org/10.1080/02626667.2023.2236092","url":null,"abstract":"ABSTRACT The relative influence of climate and catchment characteristics to the variations in runoff in five Indian river basins is assessed using the climate elasticity approach based on the Budyko hypothesis. From 1980 to 1999, catchment characteristics are found to be the main contributor to runoff variation for all of the basins except Upper Mahanadi sub-basin, where climatic factors are the major contributor. Among the climatic factors, runoff is more responsive to changes in precipitation than to changes in potential evapotranspiration. The mean contribution of climate (catchment) to runoff variation is largest at the Cauvery (Krishna) basin. The findings may be useful in planning sustainable water resources infrastructure. Investigation of the relationship between runoff changes in the basins and their land use and land cover changes, as well as the vegetation index, adds to the novelty and usefulness of the study.","PeriodicalId":55042,"journal":{"name":"Hydrological Sciences Journal-Journal Des Sciences Hydrologiques","volume":"68 1","pages":"1693 - 1710"},"PeriodicalIF":3.5,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42053928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-11DOI: 10.1080/02626667.2023.2235349
S. Budakoti, C. Singh
ABSTRACT In the present work, a detailed examination of extreme rainfall events (EREs) has been carried out using weather research and forecasting (WRF) model and remotely sensed observations over the Northwest Himalayan region. We performed high-resolution model simulations and studied EREs in association with fine-resolution Indian National Satellite System (INSAT-3D) observations. Remarkable variations noted in the remotely sensed outgoing longwave radiation and rainfall in association with model simulations during the formation of cloudburst events may be utilized to give an alert over the locations potentially affected by the EREs. We found that the fine-scale structure of various physical quantities during the formation of the cloudburst events endures remarkable variations in close agreement with the satellite-based observations. Results obtained in the present study show a promising pathway for the study, analysis and now-casting of extremely heavy rainfall events based on model simulations in conjunction with remotely sensed observations.
{"title":"Comprehensive study of extreme rainfall events using model simulations and remotely sensed observations","authors":"S. Budakoti, C. Singh","doi":"10.1080/02626667.2023.2235349","DOIUrl":"https://doi.org/10.1080/02626667.2023.2235349","url":null,"abstract":"ABSTRACT In the present work, a detailed examination of extreme rainfall events (EREs) has been carried out using weather research and forecasting (WRF) model and remotely sensed observations over the Northwest Himalayan region. We performed high-resolution model simulations and studied EREs in association with fine-resolution Indian National Satellite System (INSAT-3D) observations. Remarkable variations noted in the remotely sensed outgoing longwave radiation and rainfall in association with model simulations during the formation of cloudburst events may be utilized to give an alert over the locations potentially affected by the EREs. We found that the fine-scale structure of various physical quantities during the formation of the cloudburst events endures remarkable variations in close agreement with the satellite-based observations. Results obtained in the present study show a promising pathway for the study, analysis and now-casting of extremely heavy rainfall events based on model simulations in conjunction with remotely sensed observations.","PeriodicalId":55042,"journal":{"name":"Hydrological Sciences Journal-Journal Des Sciences Hydrologiques","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48438769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-10DOI: 10.1080/02626667.2023.2224506
C. Delus, J. Sartor, Eric Bonnot, D. François, Jean Abèle, G. Drogue
ABSTRACT The flood history of the transboundary Moselle River has so far not been analysed at the watershed scale. This study is based on a large collection of historical archives in hydrology dating to the beginning of the instrumental period. Many valuable archives are made available by the authors but data are discontinuous and heterogeneous. We describe homogenization and reconstruction methods leading to an original flood dataset covering the entire Moselle basin over the last two centuries. The flood series show that the basin is predominantly affected by oceanic floods that mostly occur in winter and that severe flooding generally affects the entire basin. A flood frequency analysis shows that the series are stationary and that flood quantiles obtained with short measured record series and reconstructed series are quite similar. However, although long historical series give robustness to the frequency analyses they also highlight bias and uncertainties related to sampling.
{"title":"New insights into Moselle River floods revealed by instrumental data","authors":"C. Delus, J. Sartor, Eric Bonnot, D. François, Jean Abèle, G. Drogue","doi":"10.1080/02626667.2023.2224506","DOIUrl":"https://doi.org/10.1080/02626667.2023.2224506","url":null,"abstract":"ABSTRACT The flood history of the transboundary Moselle River has so far not been analysed at the watershed scale. This study is based on a large collection of historical archives in hydrology dating to the beginning of the instrumental period. Many valuable archives are made available by the authors but data are discontinuous and heterogeneous. We describe homogenization and reconstruction methods leading to an original flood dataset covering the entire Moselle basin over the last two centuries. The flood series show that the basin is predominantly affected by oceanic floods that mostly occur in winter and that severe flooding generally affects the entire basin. A flood frequency analysis shows that the series are stationary and that flood quantiles obtained with short measured record series and reconstructed series are quite similar. However, although long historical series give robustness to the frequency analyses they also highlight bias and uncertainties related to sampling.","PeriodicalId":55042,"journal":{"name":"Hydrological Sciences Journal-Journal Des Sciences Hydrologiques","volume":"68 1","pages":"1553 - 1566"},"PeriodicalIF":3.5,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42930747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-10DOI: 10.1080/02626667.2023.2224004
Saghan Yadav, L. Nelapudi, Gurpinder Singh, Shushobhit Chaudhary, C. Dhanya, Viddur Arya
ABSTRACT The COVID-19 lockdown halted industrial and transportation networks, resulting in a change in the level of pollution. In this study, the analysis of pre- and post-lockdown water quality of the Yamuna River is done, and primary causes are identified, by considering five in situ parameters and four Landsat-8-derived parameters. During the 2020 lockdown, pollution-indicating in situ parameters decreased, with chemical oxygen demand decreasing the most, possibly due to reduced industrial impact. All satellite-derived indices improved during lockdown and post-lockdown periods of 2020. Even in segments with uniform flow, floating algal index and normalized difference vegetation index exhibited lower levels. In contrast, the examination of the 2021 lockdown revealed no noteworthy insights. Mapping the observations with the drainage network and location of common effluent treatment plants revealed that industrial effluents were the dominant cause of water quality fluctuations. This demonstrates the impact of industrial effluents on the degrading water quality of Yamuna.
{"title":"Impact of lockdowns and possible quantification of pollution sources on the water quality of the Yamuna River","authors":"Saghan Yadav, L. Nelapudi, Gurpinder Singh, Shushobhit Chaudhary, C. Dhanya, Viddur Arya","doi":"10.1080/02626667.2023.2224004","DOIUrl":"https://doi.org/10.1080/02626667.2023.2224004","url":null,"abstract":"ABSTRACT The COVID-19 lockdown halted industrial and transportation networks, resulting in a change in the level of pollution. In this study, the analysis of pre- and post-lockdown water quality of the Yamuna River is done, and primary causes are identified, by considering five in situ parameters and four Landsat-8-derived parameters. During the 2020 lockdown, pollution-indicating in situ parameters decreased, with chemical oxygen demand decreasing the most, possibly due to reduced industrial impact. All satellite-derived indices improved during lockdown and post-lockdown periods of 2020. Even in segments with uniform flow, floating algal index and normalized difference vegetation index exhibited lower levels. In contrast, the examination of the 2021 lockdown revealed no noteworthy insights. Mapping the observations with the drainage network and location of common effluent treatment plants revealed that industrial effluents were the dominant cause of water quality fluctuations. This demonstrates the impact of industrial effluents on the degrading water quality of Yamuna.","PeriodicalId":55042,"journal":{"name":"Hydrological Sciences Journal-Journal Des Sciences Hydrologiques","volume":"68 1","pages":"1539 - 1552"},"PeriodicalIF":3.5,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41347689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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