Streamflow Characteristics from Channel Size

Riggs, H. C.

doi:10.1061/jyceaj.0004926

Cited by 15 publications

(2 citation statements)

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“…To circumvent this limitation, recession curves were used together with groundwater level fluctuations to estimate the storage coefficient. Recession curves give a direct representation of channel storage effects and storage delay times because they express the drained volume from the basin groundwater (Boughton and Askew 1968; Hall 1968; Riggs 1985). Consequently, the storage coefficient can be determined using the following formulation (Hannula et al 2003; Chen et al 2012):

S = \frac{Q_{1}}{kA Y_{1}},

where

Q_{1}

is a streamflow rate at a specified time (m 3 /a),

k

is a recession constant, and

Y_{1}

is an average groundwater stage (m) at a specified time (years).…”

Section: Methodsmentioning

confidence: 99%

Catchment‐Wide Groundwater Budget for the Inkomati‐Usuthu Water Management Area in South Africa

Shakhane,

Mojabake

2024

Groundwater

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In South Africa, approximately 98% of the predicted total surface water resources are already being used up. Consequently, the National Water Resource Strategy considers groundwater to be important for the future planning and management of water resources. In this case, quantifying groundwater budgets is a prerequisite because they provide a means for evaluating the availability and sustainability of a water supply. This study estimated the regional groundwater budgets for the Inkomati‐Usuthu Water Management Area (Usuthu, Komati, Sabie‐Sand, and Crocodile) using the classical hydrological continuity equation. The equation was used to describe prevailing feedback loops between groundwater draft, recharge, baseflow, and storage change. The results were coarser scale estimates which, beforehand, were derived from the 2006 study. In the years to follow, groundwater reliance intensified and there was also the historic 2015/2016 drought. This inevitably led to an increased draft while the rest of the components of the groundwater budgets experienced decreases. Both Crocodile and Sabie‐Sand experienced groundwater storage depletion which led to reduced baseflow and groundwater availability, while groundwater recharge contrarily increased due to capture. Conversely, the other two catchments experienced relatively lower drafts with correspondingly higher groundwater availability and recharge while storage change was positive. The results highlighted the need for adaptive water management whose effectiveness relies on predictive studies. Consequently, future models should be developed to capture the spatial and temporal dynamism of the natural groundwater budget due to climate change, water demands, and population growth predictions.

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S = \frac{Q_{1}}{kA Y_{1}},

where

Q_{1}

is a streamflow rate at a specified time (m 3 /a),

k

is a recession constant, and

Y_{1}

is an average groundwater stage (m) at a specified time (years).…”

Section: Methodsmentioning

confidence: 99%

Catchment‐Wide Groundwater Budget for the Inkomati‐Usuthu Water Management Area in South Africa

Shakhane,

Mojabake

2024

Groundwater

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“…H. C. Riggs (1978) described the need for and the physical basis of equations for estimating streamflow characteristics from channel size, com pared published estimating relations, examined re liability of flow estimates, and made some proposals for improving estimates.…”

Section: Channel Width As An Indicator Of Discharge Characteristics I...mentioning

confidence: 99%

Geological Survey research 1978

1978

Professional Paper

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III 157 Studies of marine and coastal processes ______ 159 Estuarine and coastal hydrology __________ 159 Atlantic and Gulf Coast ____________ 159 Pacific Coast ___________________ 159 Management of natural resources on Federal and Indian lands ______________________ 164 Classification and evaluation of mineral lands _ 164 Classified land __________________ 164 Known geologic structures of producing oil and gas fields ______________ 165 Known geothermal resource areas ______ 165 Known recoverable coal resource areas ___ 165 Coal resource occurrence/development poten tial maps __________________ 165 Known leasing areas for potassium, phos phate, and sodium ___________ 165 Waterpower classification-preservation of reser voir sites _-___________________ 165 Supervision of mineral leasing ___________ 165 OCS lease sales for oil and gas _______ 166 Cooperation with other Federal agencies __ 166 Geology and hydrology applied to hazard assessment and environment-

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Semi‐determinate hydraulic geometry of river channels, South Island, New Zealand

Mosley¹

1981

Earth Surf Processes Landf

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Data to describe the morphologic, hydrologic and sedimentologic characteristics of 72 South Island, New Zealand, rivers were collected and analysed. Nearly 70 per cent of variation in channel morphology is accounted for by differences in cross-sectional area, slope, and cross-section shape; only 53 per cent of the morphologic variability could be statistically 'explained' by the hydrologic and sediment variables used. The level of explanation varied for different morphologic variables; nearly 90 per cent of the variability in cross-sectional area could be explained, but aspect ratio (maximum depth divided by hydraulic radius) was completely independent. Apart from the inadequacy of the measured variables as indices of the true underlying controlling factors, and the imperfect measurement and sampling procedures, the low level of explanation is probably due to the influence of factors such as floodplain vegetation, high quasi-random variability in bark sediment character, boundary effects imposed by bedrock bluffs, and the precise sequence of flood events, none of which are easily quantified. In addition, observations indicate that there is a large random variation in channel form which cannot be related to any factor.An attempt to relate channel morphology to flow variability, using simple indices of the latter, was unsuccessful

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Streamflow Characteristics from Channel Size

Cited by 15 publications

References 0 publications

Catchment‐Wide Groundwater Budget for the Inkomati‐Usuthu Water Management Area in South Africa

Catchment‐Wide Groundwater Budget for the Inkomati‐Usuthu Water Management Area in South Africa

Geological Survey research 1978

Semi‐determinate hydraulic geometry of river channels, South Island, New Zealand

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