Understanding river hydrology

1995 ◽  
pp. 107-135
Author(s):  
B. L. Finlayson ◽  
T. A. McMahon
Keyword(s):  
River Hydrology

scholarly journals The Impacts of Hydropower Dams in the Mekong River Basin: A Review

Water ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 265
Author(s):  
Akarath Soukhaphon ◽  
Ian G. Baird ◽  
Zeb S. Hogan
Keyword(s):  
River Basin ◽  
River System ◽  
Economic Security ◽  
Mekong River ◽  
Aquatic Biodiversity ◽  
Environmental Impact Assessments ◽  
The Social ◽  
Hydropower Dams ◽  
River Hydrology ◽  
Riparian Communities

The Mekong River, well known for its aquatic biodiversity, is important to the social, physical, and economic health of millions living in China, Myanmar, Laos, Thailand, Cambodia, and Vietnam. This paper explores the social and environmental impacts of several Mekong basin hydropower dams and groupings of dams and the geographies of their impacts. Specifically, we examined the 3S (Sesan, Sekong Srepok) river system in northeastern Cambodia, the Central Highlands of Vietnam, and southern Laos; the Khone Falls area in southern Laos; the lower Mun River Basin in northeastern Thailand; and the upper Mekong River in Yunnan Province, China, northeastern Myanmar, northern Laos, and northern Thailand. Evidence shows that these dams and groupings of dams are affecting fish migrations, river hydrology, and sediment transfers. Such changes are negatively impacting riparian communities up to 1000 km away. Because many communities depend on the river and its resources for their food and livelihood, changes to the river have impacted, and will continue to negatively impact, food and economic security. While social and environmental impact assessments have been carried out for these projects, greater consideration of the scale and cumulative impacts of dams is necessary.

scholarly journals Impact of River Hydrology on Hydraulic Engineering and Hydropower

Water ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3165
Author(s):  
Alberto Bianchi
Keyword(s):  
Hydraulic Engineering ◽  
River Hydrology ◽  
The Impact

The current theme is the impact that the awareness of the non-stationarity of hydrological phenomena, and of river hydrology in particular, has on hydraulic engineering and hydropower [...]

Combination Service for Time-variable Gravity Field Solutions (COST-G) – GRACE-FO operational combination

2020 ◽  
Author(s):  
Ulrich Meyer ◽  
Martin Lasser ◽  
Adrian Jäggi ◽  
Frank Flechtner ◽  
Christoph Dahle ◽  
...  
Keyword(s):  
Time Series ◽  
Quality Control ◽  
International Association ◽  
Time Variable ◽  
Polar Regions ◽  
Time Variable Gravity ◽  
Gravity Fields ◽  
River Hydrology ◽  
Variable Gravity ◽  
Combined Time Series

<p lang="en-US">We present the operational GRACE-FO combined time-series of monthly gravity fields of the Combination Service for Time-variable Gravity fields (COST-G) of the International Association of Geodesy (IAG). COST-G_GRACE-FO_RL01_operational is combined at AIUB and relies on operational monthly solutions of the COST-G Analysis Centers GFZ, GRGS, IfG, LUH and AIUB and the associated Analysis Centers CSR and JPL. All COST-G Analysis Centers have passed a benchmark test to ensure consistency between the different processing approaches and all of the contributing time-series undergo a strict quality control focusing on the signal content in river basins and polar regions with pronounced changes in ice mass to uncover any regularization that may bias the combination.</p> <p lang="en-US">The combination is performed by variance component estimation on the solution level, the relative monthly weights thus providing valuable and independent insight into the consistency and noise levels of the individual monthly contributions. The combined products then are validated internally in terms of noise, approximated by the non-secular, non-seasonal variability over the oceans. Once they have passed this quality control the combined gravity fields are assessed by an external board of experts who evaluate them in terms of orbit predictions, lake altimetry, river hydrology or oceanography.</p>

Impact of Climate Change on the Retreat of Himalayan Glaciers and Its Impact on Major River Hydrology

2018 ◽  
pp. 681-694
Author(s):  
Ram Karan Singh
Keyword(s):  
Climate Change ◽  
Anthropogenic Activities ◽  
Climatic Changes ◽  
Glacier Mass Balance ◽  
Run Off ◽  
Himalayan Glaciers ◽  
Freshwater Resource ◽  
River Hydrology ◽  
Major River ◽  
Cyclic Phenomenon

Himalayan Glaciers are the largest freshwater resource on earth and the rivers originating from them are an important source of water. They significantly modify stream flow both in quantity and timing as annual basin run-off is enhanced or decreased in years of negative or positive glacier mass balance respectively. Although glacial advances and retreats are a part of its natural cyclic phenomenon, the rate of de-glaciations has accelerated in recent times due to climatic changes and global warming caused by anthropogenic activities. Some of the important glaciers of Himalayas are receding at an alarming rate, which could have dire consequences on river hydrology of the main rivers of this region namely, Indus, Ganga and Brahmaputra, initially causing floods and the paradoxically, scarcity of water later. This chapter is an attempt to summarize some of the studies on Himalayan glacier retreats and also to assess its impact on the availability of freshwater in the sub-continent.

ASSESSMENT OF RIPARIAN VEGETATION SENSITIVITY TO RIVER HYDROLOGY DOWNSTREAM OF A MAJOR TEXAS DAM

2012 ◽  
Vol 30 (2) ◽  
pp. 230-244 ◽  
Author(s):  
Blake Alldredge ◽  
Georgianne Moore
Keyword(s):  
Riparian Vegetation ◽  
River Hydrology

Connectivity, migration and recruitment in a catadromous fish

2018 ◽  
Vol 69 (11) ◽  
pp. 1733 ◽  
Author(s):  
Christopher M. Bice ◽  
Brenton P. Zampatti ◽  
John R. Morrongiello
Keyword(s):  
Fish Passage ◽  
Freshwater Flow ◽  
Species Management ◽  
River Hydrology ◽  
Potential Impact ◽  
Flow Closure ◽  
Navigation Lock ◽  
Species Specific ◽  
June July ◽  
Management And Conservation

Understanding the influence of river hydrology and connectivity on the migration and recruitment of diadromous fishes is fundamental for species management and conservation. We investigated the downstream catadromous spawning migration of adult female congolli (Pseudaphritis urvillii) using acoustic telemetry, and subsequent juvenile recruitment, in the lower reaches of the River Murray, Australia, in 2009–2011. The years 2009 and 2010 were characterised by diminished freshwater flow, closure of tidal barrages, and disconnection of freshwater and estuarine habitats; however, a navigation lock was operated to facilitate downstream fish passage in 2010. In both years, >70% of individuals tagged upstream undertook downstream migrations, in association with day-of-the-year (June–July) and moonphase (full), and accumulated upstream of the tidal barrages. In 2009, fish were unable to pass the barrages and remained upstream, but in 2010, an estimated >15000 individuals passed through the navigation lock, including 40% of individuals tagged upstream. These transitioned rapidly (<24h) through the estuary and into the ocean. In association, abundances of upstream migrant juveniles in spring–summer 2010–2011 were up to 180 times greater than in spring–summer 2009–2010. Our study illustrates the potential impact of tidal barriers on migrations and population dynamics of catadromous fish, and the importance of understanding species-specific migration ecology.

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