Jacquelyn R. Duke

Baylor University

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Joseph D. White

Baylor University

Peter M. Allen

Baylor University

Ranjan S. Muttiah

The University of Texas at Arlington

J. Thad Scott

Aquatic Systems (United States)

Grace Phillip

Baylor University

Lauren Ferguson

Baylor University

Ashley Allen

Baylor University

Lisa M. Zygo

Baylor University

Berkeley Sheppard

Baylor University

Shane J. Prochnow

Chevron (United States)

Cooperative Institutions

Baylor University

Aquatic Systems (United States)

University of Arkansas at Fayetteville

University of Arkansas System

United States Department of Agriculture

Manaaki Whenua – Landcare Research

North Carolina State University

Agricultural Research Service

National Society of Professional Engineers

Institut de génétique et de développement de Rennes

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Estimation of source water to cedar elm in a central Texas riparian ecosystem

Hydrological Processes (2004)

Ranjan S. Muttiah Joseph D. White Jacquelyn R. Duke Peter M. Allen

Abstract A riparian ecosystem downstream of a small dam in central Texas was instrumented for sap flow, soil moisture content, and stream level from 2001. Stable isotopes in water (D and 18 O) were analysed from rainfall, stream, lake, and cored sapwood cellulose from cedar elm ( Ulmus crassifolia ). The isotope signature of water source to cedar elm was identified by back calculation starting with the water isotopes in cellulose, and accounting for leaf‐water evaporation and biological fractionation during cellulose synthesis. The estimated mean isotope of the source water to cedar elm was enriched above rainfall in similarity to stream water during 2002. Flow paths that may have contributed to estimated variability from regional base flow and recharge water were identified using the variably saturated HYDRUS‐2D model. Copyright © 2004 John Wiley & Sons, Ltd.

Riparian forest

10.1002/hyp.5545

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

Hydrological Processes (2006)

Jacquelyn R. Duke Joseph D. White Peter M. Allen Ranjan S. Muttiah

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. Copyright © 2006 John Wiley & Sons, Ltd.

Perennial stream

Hyporheic Zone

Water balance

10.1002/hyp.6228

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Citations (25)

The use of remote sensing and modelling to detect small-dam influences on land-use changes along downstream riparian zones

Ecohydrology & Hydrobiology (2007)

Jacquelyn R. Duke Joseph D. White Shane J. Prochnow Lisa M. Zygo Peter M. Allen

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Riparian buffer

10.1016/s1642-3593(07)70186-6