Thresholds in the storm response of a lake chain system and the occurrence and magnitude of lake overflows: Implications for flood frequency

Kusumastuti, Dyah Indriana; Sivapalan, Murugesu; Struthers, Iain; Reynolds, D. A.

doi:10.1016/j.advwatres.2008.07.016

Cited by 10 publications

(7 citation statements)

References 22 publications

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“…These factors result in dynamic contributing areas that are complex to model. Although this research focuses solely on the dynamic nature of contributing areas because of the topography of the prairie environment, it is also applicable on landscapes such as those found in Western Australia (Kusumastuti et al ., , )…”

Section: Introductionmentioning

confidence: 97%

Topographic analysis for the prairie pothole region of Western Canada

Shaw

Pietroniro

Martz

2012

Hydrological Processes

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The unique topography of the pothole region of the North American prairies creates challenges for properly determining basin contributing area. Numerous depressions or potholes within the landscape impound runoff. However, potholes can ‘fill‐spill’ resulting in surface water connections between the potholes. Surface water connectivity between potholes ultimately influences basin contributing area. Currently, automated methods, such as landscape analysis tools, treat depressions in the landscape as artifacts and simply fill the depressions to delineate a drainage basin. Using this method to calculate contributing area assumes that all surface storage has been satisfied (threshold) and the drainage basin will contribute 100% of its area for all runoff events. However, most runoff events in the prairie pothole region are pre‐threshold events that contribute only a portion of surface runoff to the outlet. These pre‐threshold events have surface storage that varies because of antecedent water levels and have a variable or dynamic potential to store further runoff in the basin. Government agencies have developed methodologies for determining pre‐threshold contributing areas, but these methodologies do not incorporate current technologies and, as a result, have limitations. We propose an automated method for determining contributing area that incorporates the fill‐spill of prairie potholes. The algorithm, which uses the D‐8 drainage direction method, automates a methodology for identifying and quantifying runoff contributing area. Any algorithm that determines pre‐threshold contributing area, must allow the DEM to be filled in an incremental manner. This will simulate increasing pond levels, and the resulting decrease in available storage in the basin, in response to runoff events. The SPILL algorithm is an iterative solution that increases the magnitude of input runoff events and records the decreasing change in available surface storage and the increase in contributing area until the storage threshold is reached and the contributing area reaches 100%. Through application of the algorithm on prairie pothole region basins, we test proposed conceptual curves that describe a hypothesized non‐linear relationship between decreasing potential storage in the landscape and contributing area. Results indicate that the proposed conceptual curves represent the relationship between potential surface storage and contributing area in the test basins very well. Copyright © 2012 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 97%

Topographic analysis for the prairie pothole region of Western Canada

Shaw

Pietroniro

Martz

2012

Hydrological Processes

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“…This greatly limits the wind-induced mixing and the presence of some biota. Increased melting of ice and snow in both the catchment and lakes in a warmer climate may result in an increased overflow and, consequently, a greater hydrological connectivity between the lakes (Kusumastuti et al 2008). …”

Section: Ecological Effects Lentic Ecosystemsmentioning

confidence: 99%

Effects of Changes in Arctic Lake and River Ice

Prowse

Alfredsen

Beltaos

et al. 2011

AMBIO

135

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Climatic changes to freshwater ice in the Arctic are projected to produce a variety of effects on hydrologic, ecological, and socio-economic systems. Key hydrologic impacts include changes to low flows, lake evaporation regimes and water levels, and river-ice break-up severity and timing. The latter are of particular concern because of their effect on river geomorphology, vegetation, sediment and nutrient fluxes, and sustainment of riparian aquatic habitats. Changes in ice phenology will affect a wide range of related biological aspects of seasonality. Some changes are likely to be gradual, but others could be more abrupt as systems cross critical ecological thresholds. Transportation and hydroelectric production are two of the socio-economic sectors most vulnerable to change in freshwater-ice regimes. Ice roads will require expensive on-land replacements while hydroelectric operations will both benefit and be challenged. The ability to undertake some traditional harvesting methods will also be affected.

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“…The flood frequency curve, typically estimated from observed flood records and widely used in flood estimation practice, is the culmination of complex interactions between climatic inputs (rainfall intensities, evaporation demand) and those landscape properties that have a bearing on the rainfall to runoff to flood peak transformation, presented within a stochastic framework [4,5,6,7,8]. While the approach adopted in part of this study is general enough, climate conditions and catchment (and storages) characteristics typical of Nagara River and Way Pegadungan catchments (where storages such as swamp areas exist along the river) will be used to parameterize the adopted conceptual models.…”

Section: Flood Frequency and Flood Occurrences; Sensitivity Analysismentioning

confidence: 99%

The Impact of Changing Storage Area on Flood Magnitude and Occurrence

Kusumastuti¹

2012

ced

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This study focuses on the impact of combined catchment and storage upon flood occurrences and flood peaks. A significant factor that plays an important role of the combined catchment and storage is the ratio of contributing catchment area to storage area (AC/AS) where the impact significantly shows increasing frequency of storage overflow and flood peaks with the increasing of AC/AS. Some case studies examined in this work, i.e. Way Pegadungan (Lampung, Sumatra) and Nagara River (South Kalimantan) catchments show similar behavior. Swamps located on the sides of downstream of Way Pegadungan as well as Nagara River act as storages during flood events. The dyke which was planned to be built increases the ratio of AC/AS significantly as storage area reduced considerably. This has an impact on flood peaks which can increase considerably. The improved understanding of these process controls will be useful in assisting the management of such catchments, particularly to assist in flood prevention and mitigation.

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Thresholds in the storm response of a lake chain system and the occurrence and magnitude of lake overflows: Implications for flood frequency

Cited by 10 publications

References 22 publications

Topographic analysis for the prairie pothole region of Western Canada

Topographic analysis for the prairie pothole region of Western Canada

Effects of Changes in Arctic Lake and River Ice

The Impact of Changing Storage Area on Flood Magnitude and Occurrence

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