Paired catchments observations on the water yield of mature eucalypt and immature radiata pine plantations in Victoria, Australia

Bren, Leon; Hopmans, P.

doi:10.1016/j.jhydrol.2007.01.018

Cited by 44 publications

(24 citation statements)

References 9 publications

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“…Average annual rainfall is 1400 mm and soils are gradational clay loams derived from sandstone and slate. Details of the physiography of the catchments, climate, geology, native vegetation, instrumentation of the weirs, collection of stream flow data and monitoring of water quality during Phase I are given by Bren et al (1979) and for Phase II by Bren and Hopmans (2007). Water quality, solutes in stream water and rainfall, and exports from the three eucalypt forest catchments during the pre-treatment calibration period were reported by Flinn et al (1979).…”

Section: Methodsmentioning

confidence: 99%

“…During this period (Phase I: 1976(Phase I: -1982 one catchment was cleared and burnt for the establishment of radiata pine in 1980 except for a 30-m wide riparian zone on either side of the stream where the original eucalypt forest was retained for the protection of water quality Stewart and Flinn, 1985). In the short-term this change in land use, clearing of eucalypt forest and establishment of radiata pine, increased annual water yield by approximately 3 ML/ha, but yield gradually decreased to pre-treatment values over time as the plantation occupied the site (Leitch and Flinn, 1986;Bren and Papworth, 1991;Bren and Hopmans, 2007). Only minor changes in water quality were observed, however exports of suspended solids and nutrients in stream water increased primarily due to higher water yield in response to clearing vegetation in the catchment (Hopmans et al, 1987).…”

Section: Introductionmentioning

confidence: 99%

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Long-term changes in water quality and solute exports in headwater streams of intensively managed radiata pine and natural eucalypt forest catchments in south-eastern Australia

Hopmans¹,

Bren²

2007

Forest Ecology and Management

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Long-term changes in water quality and solute exports in headwater streams of intensively managed radiata pine and natural eucalypt forest catchments in south-eastern Australia

Hopmans¹,

Bren²

2007

Forest Ecology and Management

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“…Successful water protection in these areas requires quantitative information about the influence of certain forestry operations on the export of nutrients to water bodies. The available knowledge is based on longterm field studies, which are usually arranged as a paired catchment set-up (Scott 1999;Joensuu et al 2002;Bren and Hopmans 2007). In a paired catchment study, runoff and water quality at the outlets of two catchments are monitored simultaneously.…”

mentioning

confidence: 99%

“…Rosén 1984;Bren and Hopmans 2007). Bren and Hopmans (2007) assessed uncertainty in the regression in the terms of experimental error (ε) in the pre-treatment annual data, when the treatment effect (T E ) is zero. They determined the effect of the treatment by comparing the magnitude of the observed T E +ε values to the pre-treatment ε values.…”

mentioning

confidence: 99%

Implications of Uncertainty in a Pre-treatment Dataset when Estimating Treatment Effects in Paired Catchment Studies: Phosphorus Loads from Forest Clear-cuts

Laurén¹,

Heinonen²,

Koivusalo³

et al. 2008

Water Air Soil Pollut

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Estimates of increased nutrient export caused by forest clear-cuttings are mostly based on long-term paired catchment studies, where the treatment effect is calculated using pre-treatment dataset regression and post-treatment records of nutrient loads. In these studies uncertainty in the regression between the pre-treatment loads from the control and from the treatment catchments is typically neglected, even though it affects determination of the magnitude and duration of the treatment effect. This uncertainty is described in terms of variance in regression coefficients and residuals. The aim was to study how uncertainty in a pre-treatment dataset is propagated to estimates of the treatment effects using two sets of paired catchment data in eastern Finland, where the total phosphorus loads following forest clear-cutting and site preparation were investigated. The results showed that neglecting the uncertainty in the pre-treatment data did not change the conclusions when the treatment effect was strong enough. However, when the treatment effect was small, neglecting the uncertainty in the pre-treatment dataset easily leads to over-interpretation of the results. The uncertainty in a pre-treatment dataset should be taken into account in the paired catchment studies in order to avoid bias in the estimation of management effects on the loads.

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“…Best known are probably the studies that have been carried out at Coweeta Hydrologic Laboratory (NC, USA) on about 25 small catchments since 1934 (Swank et al 2001) and in the Hubbard Brook Experimental Forest (NH, USA; Hornbeck et al 1997). Similar long-term data-sets of forest hydrology have also been recorded in other parts of the world, e.g., in Australia (e.g., Bren and Hopmans 2007) and New Zealand (e.g., Fahey and Jackson 1997).…”

Section: Introductionmentioning

confidence: 91%

One century of hydrological monitoring in two small catchments with different forest coverage

Stähli

Badoux

Ludwig

et al. 2010

Environ Monit Assess

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Long-term data on precipitation and runoff are essential to draw firm conclusions about the behavior and trends of hydrological catchments that may be influenced by land use and climate change. Here the longest continuous runoff records from small catchments (<1 km(2)) in Switzerland (and possibly worldwide) are reported. The history of the hydrological monitoring in the Sperbel- and Rappengraben (Emmental) is summarized, and inherent uncertainties in the data arising from the operation of the gauges are described. The runoff stations operated safely for more than 90% of the summer months when most of the major flood events occurred. Nevertheless, the absolute values of peak runoff during the largest flood events are subject to considerable uncertainty. The observed differences in average, base, and peak runoff can only partly be attributed to the substantial differences in forest coverage. This treasure trove of data can be used in various ways, exemplified here with an analysis of the generalized extreme value distributions of the two catchments. These distributions, and hence flood return periods, have varied greatly in the course of one century, influenced by the occurrence of single extreme events. The data will be made publicly available for the further analysis of the mechanisms governing the runoff behavior of small catchments, as well as for testing stochastic and deterministic models.

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Paired catchments observations on the water yield of mature eucalypt and immature radiata pine plantations in Victoria, Australia

Cited by 44 publications

References 9 publications

Long-term changes in water quality and solute exports in headwater streams of intensively managed radiata pine and natural eucalypt forest catchments in south-eastern Australia

Long-term changes in water quality and solute exports in headwater streams of intensively managed radiata pine and natural eucalypt forest catchments in south-eastern Australia

Implications of Uncertainty in a Pre-treatment Dataset when Estimating Treatment Effects in Paired Catchment Studies: Phosphorus Loads from Forest Clear-cuts

One century of hydrological monitoring in two small catchments with different forest coverage

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