By Gene E. Likens, F. Herbert Bormann (auth.), Gene E. Likens (eds.)
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Extra info for An Ecosystem Approach to Aquatic Ecology: Mirror Lake and Its Environment
1969, 1974; Bilby and Likens 1979, 1980; Meyer and Likens 1979; Hall et aI. 1980; Johnson et aI. 1981; Meyer et al. 1981). Headwater streams draining in the Valley are small but mostly perennial. Flow ranges from zero for some streams during occasional summer droughts to hundreds of m3/ha-day during snowmelt and storm events. From June to October the streams are heavily shaded by the forest canopy. As a result, daily water temperatures do not vary more than a degree or two Celsius. In winter the streams are covered by ice and snow.
1976, Journal of Water, Air, and Soil Pollution 7:364, Fig. 5. Copyright © 1977 by D. Reidel Publishing Co. ) Streamflow __~ SUMMER II: The Hubbard Brook Valley 38 Long-Term Biogeochemical Data 77 and was similar to that in precipitation. Mter 1976-77, the pattern reverted to what it had The biogeochemical data at Hubbard Brook been originally. g. Vitousek and Reiners in North America. The immense value of such 1975) and predictions of inputs for aquatic ecolong-term data has only gradually revealed it- systems.
Surface runoff is dependent on infiltration, which is related to soil characteristics and parent rock, as well as on the slope of the land, development of drainage patterns and •'channel characteristics of streams. Movement of ground water is controlled to a large extent by hydraulic conductivity of the geologic units through which it flows, as well as by hydraulic gradients within the ground-water system. Interchanges of precipitation and evaporation with the lake are affected by the wind regime in the area, which is also affected by topography (see Chapter II).
An Ecosystem Approach to Aquatic Ecology: Mirror Lake and Its Environment by Gene E. Likens, F. Herbert Bormann (auth.), Gene E. Likens (eds.)