Some water is diverted from the westward flowing Trinity River system eastward to the Sacramento River. Numerous lakes and meadows associated with glaciated areas above 5,000 feet. Disturbance Regimes . At higher elevations, historic occurrence has changed from infrequent, low and moderate intensity ground fires to infrequent, low, moderate and high intensity surface or stand replacing fires. Wide fluctuations in precipitation and temperature for periods of years result in significant or catastrophic changes in biological communities.
Landslides initiated by climatic, seismic and human events are common in steep areas of the section.
Land Use . Composition and successional sequence of some communities has changed because of plant and animal species introduced between the mid 1800's and early 1900's related to mining, grazing, forestry and recreational activities. Cultural Ecology . Humans have been utilizing the Klamath Mountains for about 8,000 years, and have been an integral part of the ecology for 2,000 to 3,000 years. Early Euroamerican influences and settlement came from mining booms concomitant with the Gold Rush.