Model-based estimates of water loss from ?patches? of the understory mosaic of the Hartheim Scots pine plantation

Wedler, M.; Heindl, B.; Hahn, Sabine; Köstner, Barbara; Bernhofer, Christian; Tenhunen, John

doi:10.1007/bf00866418

Cited by 29 publications

(11 citation statements)

References 22 publications

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“…However, although our interception may be underestimated for a forested canopy, a check on estimated infiltration using shallow-buried gypsum spheres showed an overestimation error of only 3Ð4%. A comparison of our understory transpiration (28Ð8% of stand transpiration) with other studies (20%; Wedler et al, 1996) indicates a potential overestimation of UT. But, given the unique water availability of this riparian site, a dense, productive understory may be a plausible explanation.…”

Section: Propagation Of Errors and Independent Measurement Of Hyporhementioning

confidence: 90%

Riparian influence on hyporheic‐zone formation downstream of a small dam in the Blackland Prairie region of Texas

Duke

White

Allen

et al. 2006

Hydrological Processes

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Abstract:Small-order streams have highly variable flows that can result in large temporal and spatial variation of the hyporheic zone. Dam construction along these intermittent headwater streams alters downstream flow and influences the hydrologic balance between stream water and the adjacent riparian zone. A 3-year site study was conducted along an impounded second-order stream to determine the water balance between stream, unsaturated zone, groundwater and riparian vegetation. The presence of the upstream impoundment provided near-perennial water flow in the stream channel. The observed woody plant transpiration accounted for 71% of average annual water loss in the site. The overall contribution of stream water via the hyporheic zone to site water balance was 73 cm, or 44% of total inputs. This exceeded both rainfall and upland subsurface contribution to the site. A highly dynamic hyporheic zone was indicated by high water use from woody plants that fluctuated seasonally with stream water levels. We found leaf area development in the canopy layer to be closely coupled with stream and groundwater fluctuations, indicating its usefulness as a potential indicator of site water balance for small dam systems. The net result of upstream impoundment increased riparian vegetation productivity by influencing movement of stream water to storage in the groundwater system.

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Section: Propagation Of Errors and Independent Measurement Of Hyporhementioning

confidence: 90%

Riparian influence on hyporheic‐zone formation downstream of a small dam in the Blackland Prairie region of Texas

Duke

White

Allen

et al. 2006

Hydrological Processes

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“…The use of such information, should provide guidance for appropriate sampling design depending on the objectives of each study. If [2,7,8,17,24,26,36,37,39,41,64]. The closure is then judged based on assumed or estimated errors [6,36,37,39] or on subjective criteria (e.g.…”

Section: Canopy Transpirationmentioning

confidence: 99%

Scaling xylem sap flux and soil water balance and calculating variance: a method for partitioning water flux in forests

et al. 1998

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-To partition evapotranspiration between canopy and subcanopy components in a 12-m-tall Pinus taeda forest and to assess certain aspects of environmental regulation of canopy transpiration, we quantified water flux in a forest using three approaches: 1) measuring water flux in xylem of trees, and scaling to stand transpiration of canopy trees (E C ); 2) measuring soil water content and saturated conductivity, and modeling drainage to estimate total evapotranspiration (E T ) during rainless days based on a local water balance (LWB); and 3) using an eddy correlation approach to estimate total E T . We calculated variances for each estimate, and proposed an approach to test for differences between estimates of E C and E T . Diurnal

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“…Whilst some authors explicitly set this component of the forest water balance to zero [29,31,42], others put emphasis on the significant amount of soil evaporation even under a closed forest canopy [41], especially under wet climatic conditions. Kelliher et al [19] reported that 10-20 % of the total evaporation in a closed Nothofagus forest came from the soil surface.…”

Section: The Alder Standmentioning

confidence: 99%

Water use in neighbouring stands of beech (Fagus sylvatica L.) and black alder (Alnus glutinosa (L.) Gaertn.)

1999

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Model-based estimates of water loss from ?patches? of the understory mosaic of the Hartheim Scots pine plantation

Cited by 29 publications

References 22 publications

Riparian influence on hyporheic‐zone formation downstream of a small dam in the Blackland Prairie region of Texas

Riparian influence on hyporheic‐zone formation downstream of a small dam in the Blackland Prairie region of Texas

Scaling xylem sap flux and soil water balance and calculating variance: a method for partitioning water flux in forests

Water use in neighbouring stands of beech (Fagus sylvatica L.) and black alder (Alnus glutinosa (L.) Gaertn.)

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