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Artículos de revistas sobre el tema "Ungauged rivers"

Autor: Grafiati

Publicado: 25 de mayo de 2024

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1

Agrawal, Niraj Kumar, Anil Kumar Lohani, and N. K. Goel. "Physiographic Analysis of Tehri Dam Catchment and Development of GIUH Based Nash Model for Ungauged Rivers." Current World Environment 14, no. 2 (2019): 215–30. http://dx.doi.org/10.12944/cwe.14.2.06.

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Advanced information about incoming flows is required for operation of a variety of hydraulic structures including multipurpose storage hydropower projects. Inflow forecasts are used for optimum power generation during non -monsoon season and operation of gates and spillways during the flood season. In order to develop an inflow forecasting system for a reservoir, it has been observed that many a times number of ungauged rivers directly falling into the reservoirs are not accounted for. Such is the case for the Tehri Reservoir, where 16 small rivers/tributaries which are directly contributing

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2

Bonasia, Rosanna, and Mackendy Ceragene. "Hydraulic Numerical Simulations of La Sabana River Floodplain, Mexico, as a Tool for a Flood Terrain Response Analysis." Water 13, no. 24 (2021): 3516. http://dx.doi.org/10.3390/w13243516.

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The floodplain of La Sabana River, Guerrero State, Mexico, was subject to disastrous floods due to the passage of extreme weather phenomena. This is a situation facing many ungauged rivers in Mexico, as well as in other developing countries, where increased urbanization and a lack of monitoring systems make many inhabited areas more vulnerable to flooding. The purpose of this work is to provide a tool for determining the flood terrain response to flooding based on a hydraulic study. This methodology combines a hydrological analysis of the river basin with the floodplain hydraulic study for the

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3

Lou, Hezhen, Pengfei Wang, Shengtian Yang, et al. "Combining and Comparing an Unmanned Aerial Vehicle and Multiple Remote Sensing Satellites to Calculate Long-Term River Discharge in an Ungauged Water Source Region on the Tibetan Plateau." Remote Sensing 12, no. 13 (2020): 2155. http://dx.doi.org/10.3390/rs12132155.

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Research into global water resources is challenged by the lack of ground-based hydrometric stations and limited data sharing. It is difficult to collect good quality, long-term information about river discharges in ungauged regions. Herein, an approach was developed to determine the river discharges of 24 rivers in ungauged regions on the Tibetan Plateau on a long-term scale. This method involved coupling the Manning–Strickler formula, and data from an unmanned aerial vehicle (UAV) and the Gaofen-2, SPOT-5, and Sentinel-2 satellites. We also compared the discharges calculated by using the thre

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4

Hou, Jiawei, Albert I. J. M. van Dijk, Luigi J. Renzullo, and Robert A. Vertessy. "Using modelled discharge to develop satellite-based river gauging: a case study for the Amazon Basin." Hydrology and Earth System Sciences 22, no. 12 (2018): 6435–48. http://dx.doi.org/10.5194/hess-22-6435-2018.

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Abstract. River discharge measurements have proven invaluable to monitor the global water cycle, assess flood risk, and guide water resource management. However, there is a delay, and ongoing decline, in the availability of gauging data and stations are highly unevenly distributed globally. While not a substitute for river discharge measurement, remote sensing is a cost-effective technology to acquire information on river dynamics in situations where ground-based measurements are unavailable. The general approach has been to relate satellite observation to discharge measured in situ, which pre

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5

Yang, Shengtian, Chaojun Li, Hezhen Lou, Pengfei Wang, Juan Wang, and Xiaoyu Ren. "Performance of an Unmanned Aerial Vehicle (UAV) in Calculating the Flood Peak Discharge of Ephemeral Rivers Combined with the Incipient Motion of Moving Stones in Arid Ungauged Regions." Remote Sensing 12, no. 10 (2020): 1610. http://dx.doi.org/10.3390/rs12101610.

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Ephemeral rivers are vital to ecosystem balance and human activities as essential surface runoff, while convenient and effective ways of calculating the peak discharge of ephemeral rivers are scarce, especially in ungauged areas. In this study, a new method was proposed using an unmanned aerial vehicle (UAV) combined with the incipient motion of stones to calculate the peak discharge of ephemeral rivers in northwestern China, a typical arid ungauged region. Two field surveys were conducted in dry seasons of 2017 and 2018. Both the logarithmic and the exponential velocity distribution methods w

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6

Yang, Shengtian, Juan Wang, Pengfei Wang, Tongliang Gong, and Huiping Liu. "Low Altitude Unmanned Aerial Vehicles (UAVs) and Satellite Remote Sensing Are Used to Calculated River Discharge Attenuation Coefficients of Ungauged Catchments in Arid Desert." Water 11, no. 12 (2019): 2633. http://dx.doi.org/10.3390/w11122633.

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The arid desert ecosystem is very fragile, and the change of its river discharge has a direct impact on irrigation and natural environment. River discharge attenuation coefficients is a key index to reveal the stability of desert river ecosystem. However, due to the harsh conditions in desert areas, it is difficult to establish a hydrological station to obtain data and calculate the attenuation coefficients, so it is urgent to develop new methods to master the attenuation coefficients of rivers. In this study, Taklamakan desert river was selected as the research area, and the river discharge o

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7

Basnet, Keshav, Deepak Acharya, Krishna Prasad Bhandari, Suraj Lamichhane, and Biwas Babu Sadadev. "Floodplain mapping of an ungauged river: A case study on Seti River in Pokhara, Nepal." Himalayan Journal of Applied Science and Engineering 4, no. 2 (2024): 23–39. http://dx.doi.org/10.3126/hijase.v4i2.62185.

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Settlements and infrastructures along the banks of Seti River in Pokhara, Nepal are at high risk of flood. Floodplain mapping for ungauged Seti River is not straightforward like the one for gauged rivers. Main goal of this study was to prepare floodplain maps along the ungauged Seti River in Pokhara, as a case study, using one-dimensional HEC-RAS model. First, catchment area ratio (CAR) method was applied to find annual flow in ungauged Seti River based on flow data of gauged Mardi station. Once the annual maximum flow was estimated for sufficient time length (i.e., 42 years), peak flood was p

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8

Gorbachova, Liudmyla, and Borys Khrystyuk. "Calculation Approaches of the Probable Maximum Discharge of Spring Flood at Ungauged Sites in the Southern Buh River Basin, Ukraine." Annals of Valahia University of Targoviste, Geographical Series 18, no. 2 (2018): 107–20. http://dx.doi.org/10.2478/avutgs-2018-0012.

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Abstract Calculation of probable maximum discharge of spring flood are the great practical importance, since it is the basis to plan and design of different hydraulic structures, such as dams, culverts, urban and agriculture drainage systems, etc. Thus, the updating of the methodical approaches and parameters of the empirical formulas which using in the determining of the probable maximum discharge of spring flood at ungauged sites of the river basin is an actual task. In this paper for the Southern Buh River Basin were updated the parameters of the reduction formula and the limiting intensity

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9

Archfield, S. A., P. A. Steeves, J. D. Guthrie, and K. G. Ries III. "A web-based software tool to estimate unregulated daily streamflow at ungauged rivers." Geoscientific Model Development Discussions 5, no. 3 (2012): 2503–26. http://dx.doi.org/10.5194/gmdd-5-2503-2012.

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Abstract. Streamflow information is critical for solving any number of hydrologic problems. Often times, streamflow information is needed at locations which are ungauged and, therefore, have no observations on which to base water management decisions. Furthermore, there has been increasing need for daily streamflow time series to manage rivers for both human and ecological functions. To facilitate negotiation between human and ecological demands for water, this paper presents the first publically-available, map-based, regional software tool to interactively estimate daily streamflow time serie

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10

Nigussie, Getenet, Mamaru A. Moges, Michael M. Moges, and Tammo S. Steenhuis. "Assessment of Suitable Land for Surface Irrigation in Ungauged Catchments: Blue Nile Basin, Ethiopia." Water 11, no. 7 (2019): 1465. http://dx.doi.org/10.3390/w11071465.

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Planning and decision making for new irrigation development projects requires the systematic assessment of irrigable land together with available water resources. The data required are usually not available in developing countries, and therefore a method was developed for quantifying surface water resources and potentially irrigable land in ungauged watersheds in the Upper Blue Nile Basin using Soil and Water Assessment Tool (SWAT) model and Multi-Criterion Decision Evaluation (MCDE). The method was tested using the Lah river basin in the Jabitenan district and then applied in the whole area,

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11

Aga, Alemu, Assefa Melesse, and Bayou Chane. "Estimating the Sediment Flux and Budget for a Data Limited Rift Valley Lake in Ethiopia." Hydrology 6, no. 1 (2018): 1. http://dx.doi.org/10.3390/hydrology6010001.

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Information on sediment concentration in rivers is important for the design and management of reservoirs. In this paper, river sediment flux and siltation rate of a rift valley lake basin (Lake Ziway, Ethiopia) was modeled using suspended sediment concentration (SSC) samples from four rivers and lake outlet stations. Both linear and non-linear least squares log–log regression methods were used to develop the model. The best-fit model was tested and evaluated qualitatively by time-series plots, quantitatively by using watershed model evaluation statistics, and validated by calculating the predi

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12

P. C., Shakti, Tsuyoshi Nakatani, and Ryohei Misumi. "Analysis of Flood Inundation in Ungauged Mountainous River Basins: A Case Study of an Extreme Rain Event on 5–6 July 2017 in Northern Kyushu, Japan." Journal of Disaster Research 13, no. 5 (2018): 860–72. http://dx.doi.org/10.20965/jdr.2018.p0860.

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The heavy rainfall event that occurred on 5–6 July 2017 in Northern Kyushu, Japan, caused extensive flooding across several mountainous river basins and resulted in fatalities and extensive damage to infrastructure along those rivers. For the periods before and during the extreme event, there are no hydrological observations for many of the flooded river basins, most of which are small and located in mountainous regions. We used the Gridded Surface Subsurface Hydrologic Analysis (GSSHA) model, a physically based model, to acquire more detailed information about the hydrological processes in th

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13

Khasmakhi, Hadis Pakdel, Majid Vazifedoust, Safar Marofi, and Abdollah Taheri Tizro. "Simulation of river discharge in ungauged catchments by forcing GLDAS products to a hydrological model (a case study: Polroud basin, Iran)." Water Supply 20, no. 1 (2019): 277–86. http://dx.doi.org/10.2166/ws.2019.160.

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Abstract Due to unavailability of sufficient discharge data for many rivers, an appropriate approach is required to provide accurate data for estimating discharge in ungauged watersheds. In this study, Global Land Data Assimilation System (GLDAS) datasets were integrated with Hydrologic Engineering Center Hydrologic Modeling System (HEC-HMS) to simulate the outlet river discharge in Polroud watershed, located in the North of Iran. Temperature and precipitation products generated by GLDAS were calibrated using regression analysis based on observation data for the period of 2004–2006. Then, rive

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14

Biondi, Filippo, Angelica Tarpanelli, Pia Addabbo, Carmine Clemente, and Danilo Orlando. "Pixel Tracking to Estimate Rivers Water Flow Elevation Using Cosmo-SkyMed Synthetic Aperture Radar Data." Remote Sensing 11, no. 21 (2019): 2574. http://dx.doi.org/10.3390/rs11212574.

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The lack of availability of historical and reliable river water level information is an issue that can be overcome through the exploitation of modern satellite remote sensing systems. This research has the objective of contributing in solving the information-gap problem of river flow monitoring through a synthetic aperture radar (SAR) signal processing technique that has the capability to perform water flow elevation estimation. This paper proposes the application of a new method for the design of a robust procedure to track over the time double-bounce reflections from bridges crossing rivers

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15

Archfield, S. A., P. A. Steeves, J. D. Guthrie, and K. G. Ries III. "Towards a publicly available, map-based regional software tool to estimate unregulated daily streamflow at ungauged rivers." Geoscientific Model Development 6, no. 1 (2013): 101–15. http://dx.doi.org/10.5194/gmd-6-101-2013.

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Abstract. Streamflow information is critical for addressing any number of hydrologic problems. Often, streamflow information is needed at locations that are ungauged and, therefore, have no observations on which to base water management decisions. Furthermore, there has been increasing need for daily streamflow time series to manage rivers for both human and ecological functions. To facilitate negotiation between human and ecological demands for water, this paper presents the first publicly available, map-based, regional software tool to estimate historical, unregulated, daily streamflow time

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16

Costelloe, J. F., J. T. Puckridge, J. R. W. Reid, et al. "Environmental flow requirements in arid zone rivers – a case study from the Lake Eyre Basin, central Australia." Water Science and Technology 48, no. 7 (2003): 65–72. http://dx.doi.org/10.2166/wst.2003.0425.

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The ARIDFLO project takes a multi-disciplinary approach to the collection and analysis of data required to formulate appropriate environmental flow requirements for rivers in the Lake Eyre Basin. The key drivers of the ecological processes underpinning the health of these rivers are identified by modelling whole-of-ecosystem biological responses to hydrological events over a range of spatial and temporal scales. First, the hydrology of these poorly gauged (often ungauged) rivers needs to be modelled and validated to mimic real flow and inundation patterns at the catchment, reach and waterbody

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17

Yusuf, Abdulganiyu, Romoke Ojo, Mohammed O. Idrees, Abdul-Lateef Balogun, Isa B. Salami, and Ojogbane S. Sani. "Modelling flood hazards impacted by ungauged river in urbanised area using HEC-RAS and GIS." Nigerian Journal of Technological Development 20, no. 2 (2023): 83–92. http://dx.doi.org/10.4314/njtd.v20i2.1405.

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Ilorin City is located downstream of Asa, Oyun and Awun River Basins. The Asa River is a major river that traverses the city and divides the metropolitan area into east and west, almost equally. The river often overflows its banks to inundate adjacent communities, influencing severe economic damage and impact on human lives. However, efforts to mitigate this have majorly been focused on dredging the Asa River channel which has not solved the problem. For an accurate spatial and temporal understanding of the risks of floods and their potential hazards, it is important to estimate floods using r

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18

Jakimavičius, Darius, Gintaras Adžgauskas, Diana Šarauskienė, and Jūratė Kriaučiūnienė. "Climate Change Impact on Hydropower Resources in Gauged and Ungauged Lithuanian River Catchments." Water 12, no. 11 (2020): 3265. http://dx.doi.org/10.3390/w12113265.

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Hydropower (potential and kinetic energy) is one of the most important renewable energy sources in the world. This energy is directly dependent on water resources and the hydrological cycle. Ongoing climate changes are likely to influence the availability/amount of this energy resource. The present study explores the relationship between climate changes and river runoff, projects future runoff in both gauged and ungauged river catchments, and then assesses how these alterations may affect the future hydropower resources in Lithuania. Runoff projections of the gauged rivers were evaluated apply

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19

Zhou, Mingtong, Yuchuan Guo, Ning Wang, Xuan Wei, Yunbao Bai, and Huijing Wang. "Low-Altitude Remote Sensing Inversion of River Flow in Ungauged Basins." Sustainability 14, no. 19 (2022): 12792. http://dx.doi.org/10.3390/su141912792.

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Runoff is closely related to human production, the regional environment, and hydrological characteristics. It is also an important basis for water cycle research and regional water resource development and management. However, obtaining hydrological information for uninformed river sections is complicated by harsh environments, limited transportation, sparse populations, and a low density of hydrological observation stations in the inland arid zone. Here, low-altitude remote sensing technology was introduced to combine riverbed characteristics through unmanned aerial vehicle (UAV) inversion wi

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20

Kebede, Mulugeta Genanu, Lei Wang, Kun Yang, et al. "Discharge Estimates for Ungauged Rivers Flowing over Complex High-Mountainous Regions based Solely on Remote Sensing-Derived Datasets." Remote Sensing 12, no. 7 (2020): 1064. http://dx.doi.org/10.3390/rs12071064.

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Reliable information about river discharge plays a key role in sustainably managing water resources and better understanding of hydrological systems. Therefore, river discharge estimation using remote sensing techniques is an ongoing research goal, especially in small, headwater catchments which are mostly ungauged due to environmental or financial limitations. Here, a novel method for river discharge estimation based entirely on remote sensing-derived parameters is presented. The model inputs include average river width, estimated from Landsat imagery by using the modified normalized differen

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21

Gutry-Korycka, Małgorzata, Dariusz Woronko, and Jarosław Suchożebrski. "Regional Conditions for Maximum Probable Discharge in Poland’s Rivers." Miscellanea Geographica 14, no. 1 (2010): 145–67. http://dx.doi.org/10.2478/mgrsd-2010-0014.

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Abstract The purpose of this study was to obtain and verify the methods of catchment regionalization for annual maximum discharge. An identification of Polish rivers was performed based on regional frequency analyses including recognition of regions homogeneous with respect to their physical properties and river flow parameters. The results suggest a division into two regional groups: mountain and lowland catchments. Statistical tests verify the regionalization obtained and allow to calculate regional probability curves for these two catchment groups. The results obtained may be helpful in the

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22

Roy, Suvendu, and Biswaranjan Mistri. "Estimation of Peak Flood Discharge for an Ungauged River: A Case Study of the Kunur River, West Bengal." Geography Journal 2013 (December 28, 2013): 1–11. http://dx.doi.org/10.1155/2013/214140.

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Due to unavailability of sufficient discharge data for many rivers, hydrologists have used indirect methods for deriving flood discharge amount, that is, application of channel geometry and hydrological models, for the estimation of peak discharge in the selected ungauged river basin(s) in their research/project works. This paper has studied the estimation of peak flood discharge of the Kunur River Basin, a major tributary of the Ajay River in the lower Gangetic plain. To achieve this objective, field measurements, GIS technique, and several channel geometry equations are adopted. Three import

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23

Yu, Zexing, Xiaohong Chen, and Jiefeng Wu. "Calibrating a Hydrological Model in an Ungauged Mountain Basin with the Budyko Framework." Water 14, no. 19 (2022): 3112. http://dx.doi.org/10.3390/w14193112.

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Calibrating spatially distributed hydrological models in ungauged mountain basins is complicated due to the paucity of information and the uncertainty in representing the physical characteristics of a drainage area. In this study, an innovative method is proposed that incorporates the Budyko framework and water balance equation derived water yield (WYLD) in the calibration of the Soil and Water Assessment Tool (SWAT) with a monthly temporal resolution. The impact of vegetation dynamics (i.e., vegetation coverage) on Budyko curve shape parameter ω was considered to improve the Budyko calibratio

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24

Zlatanović, N., M. Stefanović, M. Milojević, and J. Čotrić. "Automated hydrologic analysis of ungauged basins in Serbia using open source software." Water Practice and Technology 9, no. 4 (2014): 445–49. http://dx.doi.org/10.2166/wpt.2014.047.

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Drainage basins are for the most part ungauged or poorly gauged not only in Serbia but in most parts of the world, usually due to insufficient funds, but also the decommission of river gauges in upland catchments to focus on downstream areas which are more populated. Design discharges are needed for these rivers where no streamflow data are available, for various applications. Examples include river training works for flood protection measures or erosion control, design of culverts, water supply facilities, small hydropower plants, etc. This study deals with the application of freely available

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25

Piotrowski, Adam P., Jaroslaw J. Napiorkowski, Pawel M. Rowinski, and Steve G. Wallis. "Evaluation of temporal concentration profiles for ungauged rivers following pollution incidents." Hydrological Sciences Journal 56, no. 5 (2011): 883–94. http://dx.doi.org/10.1080/02626667.2011.583398.

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26

Yan, Bao-Wei, Yi-Xuan Zou, Yu Liu, Ran Mu, Hao Wang, and Yi-Wei Tang. "Addressing Spatial Heterogeneity in the Discrete Generalized Nash Model for Flood Routing." Water 13, no. 21 (2021): 3133. http://dx.doi.org/10.3390/w13213133.

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River flood routing is one of the key components of hydrologic modeling and the topographic heterogeneity of rivers has great effects on it. It is beneficial to take into consideration such spatial heterogeneity, especially for hydrologic routing models. The discrete generalized Nash model (DGNM) based on the Nash cascade model has the potential to address spatial heterogeneity by replacing the equal linear reservoirs into unequal ones. However, it seems impossible to obtain the solution of this complex high order differential equation directly. Alternatively, the strict mathematical derivatio

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27

Burgan, Halil Ibrahim, and Hafzullah Aksoy. "Annual flow duration curve model for ungauged basins." Hydrology Research 49, no. 5 (2018): 1684–95. http://dx.doi.org/10.2166/nh.2018.109.

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AbstractA flow duration curve (FDC) plots the percentage of time that flow in a stream is equal to or exceeding a given value. In a gauged basin, it is obtained by sorting the observed flow from the largest to the smallest, and plotting against the corresponding exceedance probability. At ungauged basins where no data exist, the need for developing empirical methods emerges. This study aims at developing an FDC model for ungauged basins. The model is based on the normalized nondimensional annual mean flow quantiles. The annual mean flow is empirically calculated by a regression equation that t

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Burgan, Halil Ibrahim, and Hafzullah Aksoy. "Daily flow duration curve model for ungauged intermittent subbasins of gauged rivers." Journal of Hydrology 604 (January 2022): 127249. http://dx.doi.org/10.1016/j.jhydrol.2021.127249.

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29

Peñas, Francisco J., Barquín, José, and Álvarez, César. "A comparison of modeling techniques to predict hydrological indices in ungauged rivers." Limnetica, no. 37 (January 29, 2018): 145–58. http://dx.doi.org/10.23818/limn.37.12.

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Vandaele, Remy, Sarah L. Dance, and Varun Ojha. "Deep learning for automated river-level monitoring through river-camera images: an approach based on water segmentation and transfer learning." Hydrology and Earth System Sciences 25, no. 8 (2021): 4435–53. http://dx.doi.org/10.5194/hess-25-4435-2021.

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Abstract. River-level estimation is a critical task required for the understanding of flood events and is often complicated by the scarcity of available data. Recent studies have proposed to take advantage of large networks of river-camera images to estimate river levels but, currently, the utility of this approach remains limited as it requires a large amount of manual intervention (ground topographic surveys and water image annotation). We have developed an approach using an automated water semantic segmentation method to ease the process of river-level estimation from river-camera images. O

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31

Sarhadi, Ali, Saeed Soltani, and Reza Modarres. "Probabilistic flood inundation mapping of ungauged rivers: Linking GIS techniques and frequency analysis." Journal of Hydrology 458-459 (August 2012): 68–86. http://dx.doi.org/10.1016/j.jhydrol.2012.06.039.

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Kareem, Kareem Abd Ali, and Hayder A. K. AL-Thamiry. "Identification of Scouring Zones in Ungauged River by Simulation: The Case of Galal Badrah River, Iraq." Association of Arab Universities Journal of Engineering Sciences 26, no. 3 (2019): 57–67. http://dx.doi.org/10.33261/jaaru.2019.26.3.007.

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Galal Badrah River is one of Iraqi-Iranian border crossing rivers. This river is usually seasonally flooded during any time started from January to May. Its maximum discharge is 2200 m3/s which was recorded during 1985. During floods, banks of this river at many locations need protection against scour problem during floods. A small dam was constructed on this river in 2010 for the purposes of flood control and storage of water. The weir of the dam has a design discharge of 1250 m3/s. Sediments started to accumulate in the reservoir of the dam that reduce its design capacity to 10% during 2017.

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Hasholt, Bent, Nelly Bobrovitskaya, Jim Bogen, et al. "Sediment transport to the Arctic Ocean and adjoining cold oceans*." Hydrology Research 37, no. 4-5 (2006): 413–32. http://dx.doi.org/10.2166/nh.2006.023.

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This paper reviews and synthesises available information on sediment transport to the Arctic Ocean and adjoining seas with open contact to the Atlantic and Pacific Oceans. Special emphasis is placed on calculation and estimation of the sediment flux from the mostly ungauged high Arctic areas on the American continent, in Greenland, and on islands in the Arctic Ocean, and from Russia. In the absence of reliable information on bedload fluxes for most rivers, attention is directed primarily to suspended sediment loads. By combining available monitoring data and estimates for ungauged areas, the t

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34

Jia, Yao, Huimin Lei, Hanbo Yang, and Qingfang Hu. "Terrestrial Water Storage Change Retrieved by GRACE and Its Implication in the Tibetan Plateau: Estimating Areal Precipitation in Ungauged Region." Remote Sensing 12, no. 19 (2020): 3129. http://dx.doi.org/10.3390/rs12193129.

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The Tibetan Plateau (TP) is referred to as the water tower of Asia, where water storage and precipitation have huge impacts on most major Asian rivers. Based on gravity recovery and climate experiment data, this study analyzed the terrestrial water storage (TWS) changes and estimated areal precipitation based on the water balance equation in four different basins, namely, the upper Yellow River (UYE), the upper Yangtze River (UYA), the Yarlung Zangbo River (YZ), and the Qiangtang Plateau (QT). The results show that the TWS change exhibits different patterns in the four basins and varies from −

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35

Ferrari, Alessia, Marco D'Oria, Renato Vacondio, Paolo Mignosa, and Maria Giovanna Tanda. "Hydrograph estimation at upstream ungauged sections on the Secchia River (Italy) by means of a parallel Bayesian inverse methodology." E3S Web of Conferences 40 (2018): 06034. http://dx.doi.org/10.1051/e3sconf/20184006034.

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In this work, we present a reverse flow routing procedure, which allows estimating discharge hydrographs at upstream ungauged stations by means of information available at downstream monitored sites. The reverse routing problem is solved adopting a Bayesian Geostatistical Approach (BGA). In order to capture the complex hydrodynamic field typical of many real cases of rivers including large floodable areas, meanwhile overcoming the computational time limitations, we adopted as forward model a selfdeveloped 2D-SWE parallel numerical model (PARFLOOD) that allows achieving ratio of physical to com

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Nag and Biswal. "Can a Calibration-Free Dynamic Rainfall‒Runoff Model Predict FDCs in Data-Scarce Regions? Comparing the IDW Model with the Dynamic Budyko Model in South India." Hydrology 6, no. 2 (2019): 32. http://dx.doi.org/10.3390/hydrology6020032.

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Construction of flow duration curves (FDCs) is a challenge for hydrologists as most streams and rivers worldwide are ungauged. Regionalization methods are commonly followed to solve the problem of discharge data scarcity by transforming hydrological information from gauged basins to ungauged basins. As a consequence, regionalization-based FDC predictions are not very reliable where discharge data are scarce quantitatively and/or qualitatively. In such a scenario, it is perhaps more meaningful to use a calibration-free rainfall‒runoff model that can exploit easily available meteorological infor

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Eng, K., D. M. Carlisle, D. M. Wolock, and J. A. Falcone. "PREDICTING THE LIKELIHOOD OF ALTERED STREAMFLOWS AT UNGAUGED RIVERS ACROSS THE CONTERMINOUS UNITED STATES." River Research and Applications 29, no. 6 (2012): 781–91. http://dx.doi.org/10.1002/rra.2565.

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38

Bragg, O. M., A. R. Black, R. W. Duck, and J. S. Rowan. "Approaching the physical-biological interface in rivers: a review of methods for ecological evaluation of flow regimes." Progress in Physical Geography: Earth and Environment 29, no. 4 (2005): 506–31. http://dx.doi.org/10.1191/0309133305pp460ra.

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New European legislation known as the Water Framework Directive (WFD) challenges catchment hydrologists and freshwater biologists to quantify the risk of damage to the organic communities of rivers that arises from anthropogenic distortion of the natural flow regime. Here, we take the first step towards this goal by collecting together relevant information from the two disciplines. An extensive biological literature is examined for insights into the ways in which the species and communities associated with rivers might change when the flow regime is altered. From the hydrological literature, t

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39

Grandry, M., S. Gailliez, C. Sohier, A. Verstraete, and A. Degré. "A method for low flow estimation at ungauged sites, case study in Wallonia (Belgium)." Hydrology and Earth System Sciences Discussions 9, no. 10 (2012): 11583–614. http://dx.doi.org/10.5194/hessd-9-11583-2012.

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Abstract. Being able to estimate low flows at any point of a river is really important nowadays for a good integrated management of rivers. Knowing the magnitude as well as the frequency of such extreme events becomes essential. In order to build a model of low flow calculation, usable in ungauged catchments and which takes also into account low flow frequency, we started with a low flow frequency analysis including a comparison of different distributions. Two-parameter Lognormal and Gamma were the most common distributions that fit low flow data in Wallonia. This was followed by a regionalisa

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40

Peña-Arancibia, J. L., A. I. J. M. van Dijk, M. Mulligan, and L. A. Bruijnzeel. "The role of climatic and terrain attributes in estimating baseflow recession in tropical catchments." Hydrology and Earth System Sciences 14, no. 11 (2010): 2193–205. http://dx.doi.org/10.5194/hess-14-2193-2010.

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Abstract. The understanding of low flows in rivers is paramount more than ever as demand for water increases on a global scale. At the same time, limited streamflow data to investigate this phenomenon, particularly in the tropics, makes the provision of accurate estimations in ungauged areas an ongoing research need. This paper analysed the potential of climatic and terrain attributes of 167 tropical and sub-tropical unregulated catchments to predict baseflow recession rates. Daily streamflow data (m3 s–1) from the Global River Discharge Center (GRDC) and a linear reservoir model were used to

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41

Rianna, M., F. Russo, and F. Napolitano. "Stochastic index model for intermittent regimes: from preliminary analysis to regionalisation." Natural Hazards and Earth System Sciences 11, no. 4 (2011): 1189–203. http://dx.doi.org/10.5194/nhess-11-1189-2011.

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Abstract. In small and medium-sized basins or in rivers characterized by intermittent discharges, with low or negligible/null observed values for long periods of the year, the correct representation of the discharge regime is important for issues related to water management and to define the amount and quality of water available for irrigation, domestic and recreational uses. In these cases, only one index as a statistical metric is often not enough; it is thus necessary to introduce Flow Duration Curves (FDC). The aim of this study is therefore to combine a stochastic index flow model capable

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42

Zlatanović, Nikola, and Sonja Gavrić. "Comparison of an Automated and Manual Method for Calculating Storm Runoff Response in Ungauged Catchments in Serbia." Journal of Hydrology and Hydromechanics 61, no. 3 (2013): 195–201. http://dx.doi.org/10.2478/johh-2013-0025.

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Abstract Estimation of discharge from ungauged catchments based on rainfall-runoff analysis is a very frequent task in engineering hydrology. Very often, design discharges are needed for streams or small rivers where no streamflow data is available (river training works, culverts, small hydropower plants, etc). This study uses a well established lumped hydrologic rainfall-runoff model to compare two different approaches in data preparation. The traditional method of manual obtainment of catchment parameters was compared to a more contemporary methodology using automation with geographic inform

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43

Paiva, R. C. D., W. Collischonn, M. P. Bonnet, et al. "Assimilating in situ and radar altimetry data into a large-scale hydrologic-hydrodynamic model for streamflow forecast in the Amazon." Hydrology and Earth System Sciences Discussions 10, no. 3 (2013): 2879–925. http://dx.doi.org/10.5194/hessd-10-2879-2013.

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Abstract. In this work we introduce and evaluate a data assimilation framework for gauged and radar altimetry-based discharge and water levels applied to a large scale hydrologic-hydrodynamic model for stream flow forecasts over the Amazon River basin. We used the process-based hydrological model called MGB-IPH coupled with a river hydrodynamic module using a storage model for floodplains. The Ensemble Kalman Filter technique was used to assimilate information from hundreds of gauging and altimetry stations based on ENVISAT satellite data. Model state variables errors were generated by corrupt

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Annis, Antonio, Fernando Nardi, Andrea Petroselli, et al. "UAV-DEMs for Small-Scale Flood Hazard Mapping." Water 12, no. 6 (2020): 1717. http://dx.doi.org/10.3390/w12061717.

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Devastating floods are observed every year globally from upstream mountainous to coastal regions. Increasing flood frequency and impacts affect both major rivers and their tributaries. Nonetheless, at the small-scale, the lack of distributed topographic and hydrologic data determines tributaries to be often missing in inundation modeling and mapping studies. Advances in Unmanned Aerial Vehicle (UAV) technologies and Digital Elevation Models (DEM)-based hydrologic modeling can address this crucial knowledge gap. UAVs provide very high resolution and accurate DEMs with low surveying cost and tim

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K.C., Prakash, Suresh Baral, Binaya Kumar Mishra, and Indra Prasad Timilsina. "Experimental and Numerical Simulations of Sediment in Fusre River Basin, Nepal." Himalayan Journal of Applied Science and Engineering 3, no. 1 (2022): 39–52. http://dx.doi.org/10.3126/hijase.v3i1.48254.

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This study presents about the analysis of sediment generation of the ungauged basin Fusre basin by modeling and also with the help of rainfall simulator. Many rivers in Nepal are either ungauged or poorly gauged due to extreme complex terrains, monsoon climate and lack of technical and financial supports. The Soil and Water Assessment Tool (SWAT) was applied for watershed delineation of the Fusre basin and the basin delineated into seven sub-basin that generate the river network, which also provides the information like stream link, stream order, stream length, slope etc. The calibration was p

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Ferrari, Alessia, Marco D'Oria, Renato Vacondio, Alessandro Dal Palù, Paolo Mignosa, and Maria Giovanna Tanda. "Discharge hydrograph estimation at upstream-ungauged sections by coupling a Bayesian methodology and a 2-D GPU shallow water model." Hydrology and Earth System Sciences 22, no. 10 (2018): 5299–316. http://dx.doi.org/10.5194/hess-22-5299-2018.

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Abstract. This paper presents a novel methodology for estimating the unknown discharge hydrograph at the entrance of a river reach when no information is available. The methodology couples an optimization procedure based on the Bayesian geostatistical approach (BGA) with a forward self-developed 2-D hydraulic model. In order to accurately describe the flow propagation in real rivers characterized by large floodable areas, the forward model solves the 2-D shallow water equations (SWEs) by means of a finite volume explicit shock-capturing algorithm. The two-dimensional SWE code exploits the comp

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Hulley, Mike, Colin Clarke, and Ed Watt. "Occurrence and magnitude of low flows for Canadian rivers: an ecozone approach." Canadian Journal of Civil Engineering 41, no. 1 (2014): 1–8. http://dx.doi.org/10.1139/cjce-2013-0300.

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Low-flow occurrence and magnitude have been documented for Canada using the National Ecological Framework. The low flow database is composed of the 7-day low flow with 2-year return period (7Q2) values for 453 natural flow hydrometric stations with record lengths of at least 30 years; drainage areas ranged from 10 to 30 000 km2. Occurrence zones corresponding to predominant season for annual low flows are associated with ecozones. The ecozone scale was found to be suitable for regional analysis for several ecozones. For some ecozones there were insufficient data for regional analysis and for o

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48

Gao, Zhen, Guoqiang Tang, Wenlong Jing, Zhiwei Hou, Ji Yang, and Jia Sun. "Evaluation of Multiple Satellite, Reanalysis, and Merged Precipitation Products for Hydrological Modeling in the Data-Scarce Tributaries of the Pearl River Basin, China." Remote Sensing 15, no. 22 (2023): 5349. http://dx.doi.org/10.3390/rs15225349.

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Satellite and reanalysis precipitation estimates of high quality are widely used for hydrological modeling, especially in ungauged or data-scarce regions. To improve flood simulations by merging different precipitation inputs or directly merging streamflow outputs, this study comprehensively evaluates the accuracy and hydrological utility of nine corrected and uncorrected precipitation products (TMPA-3B42V7, TMPA-3B42RT, IMERG-cal, IMERG-uncal, ERA5, ERA-Interim, GSMaP, GSMaP-RNL, and PERSIANN-CCS) from 2006 to 2018 on a daily timescale using the Coupled Routing and Excess Storage (CREST) hydr

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Quintero, Felipe, Witold F. Krajewski, and Marcela Rojas. "A Flood Potential Index for Effective Communication of Streamflow Forecasts at Ungauged Communities." Journal of Hydrometeorology 21, no. 4 (2020): 807–14. http://dx.doi.org/10.1175/jhm-d-19-0212.1.

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AbstractThis study proposes a flood potential index suitable for use in streamflow forecasting at any location in a drainage network. We obtained the index by comparing the discharge magnitude derived from a hydrologic model and the expected mean annual peak flow at the spatial scale of the basin. We use the term “flood potential” to indicate that uncertainty is associated with this information. The index helps communicate flood potential alerts to communities near rivers where there are no quantitative records of historical floods to provide a reference. This method establishes a reference th

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Benito, G., B. A. Botero, V. R. Thorndycraft, et al. "Rainfall-runoff modelling and palaeoflood hydrology applied to reconstruct centennial scale records of flooding and aquifer recharge in ungauged ephemeral rivers." Hydrology and Earth System Sciences Discussions 7, no. 6 (2010): 9631–60. http://dx.doi.org/10.5194/hessd-7-9631-2010.

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Abstract. In this study we propose a multi-source data approach for quantifying long-term flooding and aquifer recharge in ungauged ephemeral rivers. The methodology is applied to the Buffels River, at 9000 km2 the largest ephemeral river in Namaqualand (NW South Africa), a region with scarce stream flow records limiting research investigating hydrological response to global change. Daily discharge and annual flood series (1965–2006) were estimated from a distributed rainfall-runoff hydrological model (TETIS) using rainfall gauge records located within the catchment. The model was calibrated a

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