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<br /> <br />A <br /> <br />Pool and dff/e <br />stream <br /> <br /> <br />~// <br />, <br />/ <br />, <br />, <br />, <br />, <br />/// <br /> <br />B <br /> <br /> <br />Figure 14, Surface-water exchange witlr ground water in tire hyporlleic zOlle is associated with abrupt challges <br />ill streambed slope (A) and with stream meanders (8), <br /> <br /> <br />Pool and riffle stream in Colorado. (Photograph <br />by Robert Broshears.) <br /> <br /> <br /> <br />~(~ <br /> <br />~ <br /> <br /> <br />1 <br /> <br />------- <br /> <br />/ <br />I <br />\ <br />\ <br />, <br /> <br />\,-\0 <br />" "" <br />'.......~ r h e i C <br />----- <br /> <br />\ <br />I~ <br />I Direction of <br />;/ ground-water <br />~/ flow <br />~/ <br />,0" <br />_/ <br /> <br />Figure 15, Streambeds and bmlks are llllique environments because they are where groulld water that draills <br />much of tire subsurface of lalldscapes illteracts with surface water that draills muclr of tire surface oflalldscapes, <br /> <br />17 <br />