SOIL SURVEY

-14-Smith (1972) found marked diurnal variations in the discharge of the Kicking Hors eRiver at the Field bridge during the summer of 1972, with daily extremes varying b yfactors of 1 .5 to 2 .0 . The melting glaciers also contribute large amounts of glacia lsilt which produces the high turbidity in the Yoho River and some of the other streams .In addition to the abovementioned streams, there are many minor perennial streams a swell as numerous intermittent streams which flow only during snowmelt or occasionall yafter heavy rainstorms .Because of the generally steep topography, most of the Park is well drained .However, in the Ottertail Flats areas along the Kicking Horse River, along th eBeaverfoot River, and in the Narao Lakes area, there are fairly extensive floodplai nareas with poor drainage . Seepage and groundwater discharge also cause small area sof imperfectly to poorly drained soils at the bases of a few mountain slopes . Theseareas are usually of limited extent, the exception being significant areas of seepag eand groundwater discharge along benches above the Amiskwi River, along Catarac tBrook and below the northeast face of Mount Hurd .Sixty-four lakes and ponds have been identified in Yoho National Par kwith the majority of them lying in the northeast half of the Park . The lakes rang ein elevation from 1,118 m (Ottertail Flats Lake) to 2,455 m (Kiwetinok Lake) .Most of the lakes are small, with over half of them having surface areas of lessthan 5 ha and depths less than 10 m . Only Emerald Lake and McArthur Lake ar emore than 75 ha in area and even these two lakes are small when compared wit hsome lakes in other mountain National Parks . McArthur Lake is also the deepes tlake, with a depth of 84 m (Mudry and Anderson 1975) .Most of the Lakes in the Park are cirque lakes which have formed as th eresult of glacial action (Figure 8) . In general, they have a very small amount o fshoreline development; are oval or oblong in shape; occupy amphitheater shape dbasins; and are found at heads of glaciated valleys . Examples of cirque lakes ar eMcArthur, Oesa, Sherbrooke, Fairy, and Hamilton Lakes . A few lakes, such a sEmerald, Wapta, Duchesnay, and Summit Lakes have forme d . in depressions in th emain parts of glaciated valleys and are generally dammed by glacial morraine s(Mudry and Anderson 1975; Drew 1975) .