Estimation of log-normal quantiles: Monte Carlo results and first-order approximations

Hoshi, Kiyoshi; Stedinger, Jery R.; Burges, Stephen J.

doi:10.1016/0022-1694(84)90069-6

Cited by 40 publications

(23 citation statements)

References 33 publications

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“…These data were used to 7Q10 values were interpolated (Table 1). The fitting scheme was Stedinger's quantile method, described in Hoshi et al (1984). The corresponding low flow rates in Icicle and Nason Creeks were determined using baseflow regression relationships with the gauging stations located along the Wenatchee River.…”

Section: Fig 1 Wenatchee River Basinmentioning

confidence: 99%

An assessment of the current and future thermal regimes of three streams located in the Wenatchee River basin, Washington State: some implications for regional river basin systems

Cristea

Burges

2009

Climatic Change

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We examine summer temperature patterns in the Wenatchee River and two of its major tributaries Icicle and Nason Creeks, located in the Pacific Northwest region of the United States. Through model simulations we evaluate the cooling effects of mature riparian vegetation corridors along the streams and potential increases due to global warming for the 2020s-2080s time horizons. Site potential shade influences are smaller in the mainstream due to its relatively large size and reduced canopy density in the lower reaches, proving a modest reduction of about 0.3 • C of the stream length average daily maximum temperature, compared with 1.5 • C and 2.8 • C in Icicle and Nason Creeks. Assuming no changes in riparian vegetation shade, stream length-average daily maximum temperature could increase in the Wenatchee River from 1-1.2 • C by the 2020s to 2 • C in the 2040s and 2.5-3.6 • C in the 2080s, reaching 27-30 • C in the warmest reaches. The cooling effects from the site potential riparian vegetation are likely to be offset by the climate change effects in the Wenatchee River by the 2020s. Buffers of mature riparian vegetation along the banks of the tributaries could prevent additional water temperature increases associated with climate change. By the end of the century, assuming site potential shade, the tributaries could have a thermal condition similar to today's condition which has less shade. In the absence of riparian vegetation restoration, at typical summer low flows, stream length average daily mean temperatures could reach about 16.4-17 • C by the 2040s with stream length average daily maxima around 494 Climatic Change (2010) 102:493-520 19.5-20.6 • C, values that can impair or eliminate salmonid rearing and spawning. Modeled increases in stream temperature due to global warming are determined primarily by the projected reductions in summer streamflows, and to a lesser extent by the increases in air temperature. The findings emphasize the importance of riparian vegetation restoration along the smaller tributaries, to prevent future temperature increases and preserve aquatic habitat.

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Section: Fig 1 Wenatchee River Basinmentioning

confidence: 99%

An assessment of the current and future thermal regimes of three streams located in the Wenatchee River basin, Washington State: some implications for regional river basin systems

Cristea

Burges

2009

Climatic Change

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“…All the commonly used frequency distribution functions for prediction of extreme flood values namely Gumbel's extreme value distribution (Ang & Tang, 1984;Gumbel, 1958), Log-Pearson Type II distribution (IACWD, 1982) and Log-normal distribution (Hoshi, Stedinger, & Burges, 1984;Stedinger, 1980) were employed and compared. Gumbel's method, which is one of the most widely preferred and suitable for statistical distribution used for frequency analysis.…”

Section: Flood Frequency Analysismentioning

confidence: 99%

Hydrodynamic Simulation of River Yamuna for Riverbed Assessment: A Case Study of Delhi Region

Vijay

Sargoankar

Gupta

2006

Environ Monit Assess

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A well known river hydrodynamic model RiverCAD has been used to simulate and visualize flood scenarios for different designated flood flows under complex riverbed geometry with several man made structures like bridges and barrages. The model applied successfully for the stretch of 23 km in the Yamuna floodplain of Delhi region from Wazirabad barrage in the upstream to Okhla barrage. Flood flows for various return periods namely once in 10, 25, 50 and 100 years were estimated based on recorded flow data for the period of 1963 to 2003 using standard flood frequency analysis techniques. The simulation results were compared and the model was calibrated with water surface elevation records of the previous floods at various barrage and bridge locations. Simulation results enabled prediction of maximum water levels, submergence scenarios and land availability under different designated flood flows for riverbed assessment, development and management.

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“…A method that does almost as well as the moment method for low-skew distributions, and much better for highly skewed distributions, estimates τ bŷ provided that x (1) + x (n) − 2x 0.50 > 0, where x (1) and x (n) are the smallest and largest observations andx 0:50 is the sample median (Stedinger 1980;Fig. 6.3 Lognormal probability density functions with various standard deviations σ Hoshi et al 1984). If x (1) + x (n) − 2x 0:50 < 0, the sample tends to be negatively skewed and a three-parameter lognormal distribution with a lower bound cannot be fit with this method.…”

Section: ð6:79þmentioning

confidence: 99%

An Introduction to Probability, Statistics, and Uncertainty

Loucks

Beek

2017

Water Resource Systems Planning and Management

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Estimation of log-normal quantiles: Monte Carlo results and first-order approximations

Cited by 40 publications

References 33 publications

An assessment of the current and future thermal regimes of three streams located in the Wenatchee River basin, Washington State: some implications for regional river basin systems

An assessment of the current and future thermal regimes of three streams located in the Wenatchee River basin, Washington State: some implications for regional river basin systems

Hydrodynamic Simulation of River Yamuna for Riverbed Assessment: A Case Study of Delhi Region

An Introduction to Probability, Statistics, and Uncertainty

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