A PLAN FOR CONSTRUCTING PROTECTION FOREST SYSTEM IN THE YANGTZE RIVER VALLEY

Wang Yon-gan

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A PLAN FOR CONSTRUCTING PROTECTION FOREST SYSTEM IN THE YANGTZE RIVER VALLEY

- A PLAN FOR CONSTRUCTING PROTECTION FOREST SYSTEM IN THE YANGTZE RIVER VALLEY
- Bulletin of Soiland Water Conservation Vol. 6, Issue 1, Pages: 33-37(1987)
- 作者机构：
  
  林业部中南规划设计院
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- Published：1987
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Wang Yon-gan. A PLAN FOR CONSTRUCTING PROTECTION FOREST SYSTEM IN THE YANGTZE RIVER VALLEY[J]. Bulletin of Soiland Water Conservation, 1987, 6(1): 33-37.
DOI：

Wang Yon-gan. A PLAN FOR CONSTRUCTING PROTECTION FOREST SYSTEM IN THE YANGTZE RIVER VALLEY[J]. Bulletin of Soiland Water Conservation, 1987, 6(1): 33-37. DOI：

摘要

目前

长江流域主要灾害有洪水、水土流失和泥沙淤积

其中水土流失造成地力下降

产量减低

航道缩短

水库失效。建设全流域整体防护林体系

是消除和控制这些危害的根本。它们是:一、上游高山峡谷区水源涵养林体系;二、中游水土保持林体系;三、中下游平原农田林网和护岸林体系。这些整体防护林体系建成后

长江流域的森林覆被率可达20—30%

生态系统就会实现良性循环。

Abstract

The existent main disasters on the Yangtze valley are flood

loss of water

erosion of soil and deposit of silt. Among them

the loss of water and erosion of soil lead up to a decrease of productivity of land

a reduction of yield

a shortening of channel and a loss of reservoir efficiency. To construct total protection forest system on the whole valley is the fundamental to control or eliminate these disasters. It includes: 1)the system of forest for conserv'ation of water supply on high mountainous gorge district in upper reaches; 2)the system of soil and water conservation forest in middle reaches; and 3)the system of protective belts of agricultural land and bund protective forest in plain of middle and lower reaches. After completion of these systems

the ratio of forest cover in the Yangtze valley may reach 20-30% and the virtuous cycle in the ecological system will be realized.

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