Hydrological Dynamics I: Surface Waters, Flood and Sediment Dynamics

Baker, C. M.; Thompson, J. R.; Simpson, Matthew G.

doi:10.1002/9781444315813.ch6

Cited by 34 publications

(31 citation statements)

References 113 publications

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“…In common with other wetlands where water levels have been maintained at higher and less variable levels (e.g. Beilfuss and Barzen, 1994;Ni et al, 2006;Baker et al, 2009), major ecological changes have resulted. These include the deterioration of the phumdis which are a special characteristic of the lake.…”

Section: Discussionmentioning

confidence: 99%

“…Resulting ecological changes within wetlands may be exacerbated by the impacts of climate change with implications for wetland conservation, restoration and the wise use of wetland resources (Poff et al, 2002;Erwin, 2009). Projected intensification of the hydrological cycle associated with rising global temperatures (IPCC, 2007) will have large implications for wetlands which by their very nature are sensitive to changes in local and catchment-wide hydrometeorological conditions (Baker et al, 2009). The most pronounced impacts of climate change upon wetlands will be modifications to hydrological regimes.…”

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confidence: 99%

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Modelling the impact of prescribed global warming on runoff from headwater catchments of the Irrawaddy River and their implications for the water level regime of Loktak Lake, northeast India

Singh

Thompson

French

et al. 2010

Hydrol. Earth Syst. Sci.

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Abstract. Climate change is likely to have major implications for wetland ecosystems, which will include altered water level regimes due to modifications in local and catchment hydrology. However, substantial uncertainty exists in the precise impacts of climate change on wetlands due in part to uncertainty in GCM projections. This paper explores the impacts of climate change upon river discharge within three sub-catchments of Loktak Lake, an internationally important wetland in northeast India. This is achieved by running pattern-scaled GCM output through distributed hydrological models (developed using MIKE SHE) of each subcatchment. The impacts of climate change upon water levels within Loktak Lake are subsequently investigated using a water balance model. Two groups of climate change scenarios are investigated. Group 1 uses results from seven different GCMs for an increase in global mean temperature of 2 • C, the purported threshold of "dangerous" climate change, whilst Group 2 is based on results from the HadCM3 GCM for increases in global mean temperature between 1 • C and 6 • C. Results from the Group 1 scenarios show varying responses between the three sub-catchments. The majority of scenario-sub-catchment combinations (13 out of 21) indicate increases in discharge which vary from <1% to 42% although, in some cases, discharge decreases by as much as 20%. Six of the GCMs suggest overall increases in river flow to Loktak Lake (2-27%) whilst the other results in a modest (6%) decline. In contrast, the Group 2 scenarios lead to an almost linear increase in total river flow to Loktak Lake with

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Modelling the impact of prescribed global warming on runoff from headwater catchments of the Irrawaddy River and their implications for the water level regime of Loktak Lake, northeast India

Singh

Thompson

French

et al. 2010

Hydrol. Earth Syst. Sci.

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show abstract

“…Wetlands are critical nodes in the Earth system where land-atmosphere fluxes are strongly dependent on seasonal and interannual hydrological variability (Coe, 1998;Baker et al, 2009;O'Connor et al, 2010;. In wetlands, the availability of water introduces important feedbacks on climate via surface fluxes of energy and water and these areas form a key link between the hydrological and carbon cycles (Ward and Robinson, 2000;Gedney et al, 2004;Seneviratne et al, 2006Seneviratne et al, , 2010Coe et al, 2009;.…”

Section: T R Marthews Et Al: High-resolution Global Topographic Inmentioning

confidence: 99%

High-resolution global topographic index values for use in large-scale hydrological modelling

Marthews

Dadson

Lehner

et al. 2015

Hydrol. Earth Syst. Sci.

101

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Abstract. Modelling land surface water flow is of critical importance for simulating land surface fluxes, predicting runoff and water table dynamics and for many other applications of Land Surface Models. Many approaches are based on the popular hydrology model TOPMODEL (TOPography-based hydrological MODEL), and the most important parameter of this model is the well-known topographic index. Here we present new, high-resolution parameter maps of the topographic index for all ice-free land pixels calculated from hydrologically conditioned HydroSHEDS (Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales) data using the GA2 algorithm (GRIDATB 2). At 15 arcsec resolution, these layers are 4 times finer than the resolution of the previously best-available topographic index layers, the compound topographic index of HYDRO1k (CTI). For the largest river catchments occurring on each continent we found that, in comparison with CTI our revised values were up to 20 % lower in, e.g. the Amazon. We found the highest catchment means were for the Murray-Darling and Nelson-Saskatchewan rather than for the Amazon and St. Lawrence as found from the CTI. For the majority of large catchments, however, the spread of our new GA2 index values is very similar to those of CTI, yet with more spatial variability apparent at fine scale. We believe these new index layers represent greatly improved global-scale topographic index values and hope that they will be widely used in land surface modelling applications in the future.

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“…The introduction of solutes into wetland systems occurs with the inflow of water as dissolved chemical species, or as a result of the dissolution of riverine or aeolian particulates (Garstang et al, 1998;Krah et al, 2004;Krah et al, 2006;Baker et al, 2009). Once in the system the solutes may undergo a series of transformations due to interactions between hydrological, biological and geochemical processes (Mitsch and Gosselink, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The progressive removal of water by evapotranspiration may ultimately cause solutes to reach saturation, resulting in their removal from solution through precipitation (Barbiero et al, 2002;Barnes et al, 2002;Furquim et al, 2004;Humphries et al, 2010;Humphries et al, 2011). This plays a major role in the chemical evolution of waters in such systems.…”

Section: Introductionmentioning

confidence: 99%

Variability in chemistry of surface and soil waters of an evapotranspiration-dominated flood-pulsed wetland: solute processing in the Okavango Delta, Botswana

Mosimane¹,

Struyf²,

Gondwe³

et al. 2017

WSA

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Hydrological Dynamics I: Surface Waters, Flood and Sediment Dynamics

Cited by 34 publications

References 113 publications

Modelling the impact of prescribed global warming on runoff from headwater catchments of the Irrawaddy River and their implications for the water level regime of Loktak Lake, northeast India

Modelling the impact of prescribed global warming on runoff from headwater catchments of the Irrawaddy River and their implications for the water level regime of Loktak Lake, northeast India

High-resolution global topographic index values for use in large-scale hydrological modelling

Variability in chemistry of surface and soil waters of an evapotranspiration-dominated flood-pulsed wetland: solute processing in the Okavango Delta, Botswana

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