Abstract：As an important component of stream-subsurface exchange processes, lateral hyporheic exchange plays a crucial role in maintaining health of river and riparian ecosystems. In order to reveal the discipline of lateral hyporheic exchange induced by bank morphology, 10 runs of circulation flume experiments with idealized sinusoidal curved bank and 4 runs of comparison experiments with straight bank were conducted in varying flow conditions. The experimental results showed that the lateral hyporheic exchange also consisted of advection (pumping exchange), diffusion and micro-circulation, which was similar to the vertical hyporheic exchange. The increasing stream Reynolds Number Re intensified the effect of diffusion and micro-circulation. The presence of curved bank morphologies produced additional exchange under all flow conditions. With increasing bank amplitude and flow velocity, the pumping exchange (advective exchange) gradually became the main exchange pattern in the earth time of hyporheic exchange.
林俊强, 严忠民, 夏继红. 弯曲河岸侧向潜流交换试验[J]. 水科学进展, 2013, 24(1): 118-124.
LIN Junqiang, YAN Zhongmin, XIA Jihong. Laboratory experiments on lateral hyporheic exchange in riverbanks with curved bank morphology. Advances in Water Science, 2013, 24(1): 118-124.
TONIAN D, BUFFINGTON J M. Hyporheic exchange in gravel bed rivers with pool-riffle morphology: Laboratory experiments and three-dimensional modeling [J]. Water Resources Research, 2007, 43: W01421.
[2]
金光球, 李凌. 河流中潜流交换研究进展[J]. 水科学进展, 2008, 19(2): 285-293. (JIN Guangqiu, LI Ling. Advancement in the hyporheic exchange in rivers [J]. Advances in Water Science, 2008, 19(2): 285-293. (in Chinese))
[3]
TONINA D, BUFFINGTON J M. Hyporheic exchange in mountain rivers: Ⅰ: Mechanics and environmental effects [J]. Geography Compass, 2009, 13(3): 1063-1086.
[4]
HARVEY J W, WAGNER B J. BENCALA K E. Evaluating the reliability of the stream tracer approach to characterize stream-subsurface water exchange [J]. Water Resources Research, 1996, 32(8): 2441-2451.
[5]
HARVEY J W, BENCALA K E. The effect of streambed topography on surface-subsurface water interactions in mountain catchments [J]. Water Resources Research, 1993, 29(1): 89-98.
[6]
KASAHARA T, WONDZELL S M. Geomorphic controls on hyporheic exchange flow in mountain streams [J]. Water Resources Research, 2003, 39(1): 1005.
[7]
BUFFINGTON J M, LISLE T E, WOODSMITH R D, et al. Controls on the size and occurrence of pools in coarse-grained forest rivers [J]. River Research and Applications, 2002, 18: 507-531.
[8]
SAWYER A H, CARDENAS M B, BUTTLES J. Hyporheic temperature dynamics and heat exchange near channel-spanning logs [J]. Water Resources Research, 2012, 48, W01529.
[9]
ELLIOTT A, BROOKS N H. Transfer of non-sorbing solutes to a streambed with bed forms: Theory [J]. Water Resources Research, 1997, 33(1): 123-136.
[10]
ELLIOTT A, BROOKS N H. Transfer of non-sorbing solutes to a streambed with bed forms: Laboratory experiments [J]. Water Resources Research, 1997, 33(1): 137-151.
[11]
PACKMAN A I, SALEHIN M, ZARAMELLA M. Hyporheic exchange with gravel beds: Basic hy-drodynamic interactions and bedform-induced advec-tive flows [J]. Journal of Hydraulic Engineering, 2004, 130(7): 647-656.
[12]
CARDENAS M B, WILSON J L. Hydro-dynamics of coupled flow above and below a sedi-ment-water interface with triangular bedforms [J]. Advances in Water Resources, 2007, 30: 301-313.
[13]
WROBLICKY G J, CAMPANA M E, VALETT H M, et al. Seasonal variation in surface-subsurface water exchange and lateral hyporheic area of two stream-aquifer systems [J]. Water Resources Research, 1998, 34(3): 317-328.
