Forests and Water in the Light of Scientific Investigation: By Raphael Zon. Forest Service, United States Department of Agriculture |
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59th congress Académie des sciences acre agriculture Alsace altitudes American forestry amount of precipitation amount of water average basin beech Boden British India Bulletin cent Centralblatt climate déboisement decrease deforestation discharge drainage drainage basin eaux et forêts effect of forests Einfluss des Waldes engineers erosion evaporation feet forest cover Forest leaves forestière forêts sur le forstlich-meteorologischen forstliche forstlichen Versuchswesen gesamte Forstwesen ground water humidity Inches Inches Inches increase Indian forester Influence des forêts influence of forests inondations Jagdwesen Klima l'influence land leaf litter level country Meteorologie Meteorologische Mittheilungen moisture Monthly weather review mountains Niederschläge observations Paris period pine forest precipitation rain rainfall reboisement régime des eaux region relation of forests Revue des eaux slopes snow Société springs square mile Stationen stream flow stream gaugings surface run-off temperature tion transpiration trees U. S.-Department Ueber den Einfluss vegetable cover Washington water supply watershed Zeitschrift für Forst Zeitschrift für Forstwesen
Popular passages
Page 74 - Croumbie), LL.D. Reboisement in France; or, Records of the Replanting of the Alps, the Cevennes, and the Pyrenees with Trees, Herbage, and Bush. Demy 8vo.
Page 62 - Plaisia, which disappeared during the entire time that the mountain remained cleared of its forests (from the end of the eighteenth century to the middle of the nineteenth), and reappeared 30 years ago, when the work of reforesting the slope had been finished.
Page 103 - Report of the secretary of agriculture on the Southern Appalachian and White Mountain watersheds.
Page 86 - Houston, Edwin J. Outlines of forestry; or. The elementary principles underlying the science of forestry ; being a series of primers of forestry. 254 p. Philadelphia, 1893. How the woods and forests affect the rain. (Chambers
Page 73 - Timber of the Edwards plateau of Texas; its relation to climate, water supply, and soil.
Page 23 - Accurate observations, continued for many years in different parts of the world, establish with certainty the following facts in regard to the influence of forests upon climate : The forest lowers the temperature of the air inside and above it. The vertical influence of forests upon temperature extends in some eases to a height of 5,000 feet.
Page 23 - ... in some cases to more than 25 per cent. The influence of mountains upon precipitation is increased by the presence of forests. The influence of forests upon local precipitation is more marked in the mountains than in the plains. Forests in broad continental valleys enrich with moisture the prevailing air currents that pass over them, and thus enable larger quantities of moisture to penetrate into the interior of the continent. The destruction of such forests, especially if followed by weak, herbaceous...
Page 75 - Forests and reservoirs in their relation to stream flow, with particular reference to navigable rivers.
Page 38 - Cultivated ground freezes especialy deep during the winter if saturated with rain water at the time of the first fall frost. Surface run-off from open fields is further increased when thaws during the winter coat the ground under the snow with an icy sheet, over which the snow waters run off in the spring without penetrating the ground. In the forest, on the other hand, the soil is warmer than in the open. It is protected from radiation by trees. It is further protected by the leaf litter, a poor...
Page 17 - If by this is meant that the precipitation over the eastern part of the United States is derived entirely from evaporation from the Gulf of Mexico and the Atlantic Ocean, the statement is not entirely correct. It is true that the southern winds which prevail all over the eastern United States during the summer pass over the Atlantic Ocean and the Gulf of Mexico and reach the land loaded with moisture.