JIA Sheng-hai.Discussion on Strategy of Soil and Water Loss Control in Changdu Area, Tibet[J].Research of Soil and Water Conservation,2003,10(04):253-256.
西藏昌都地区水土流失治理方略探讨
- Title:
- Discussion on Strategy of Soil and Water Loss Control in Changdu Area, Tibet
- 分类号:
- S157
- 摘要:
- 昌都地区地处横断山区的金沙江、澜沧江、怒江的中上游，平均海拔3500m以上，地貌的基本形态分属高山和高原。牧草地是本区最重要的土地利用类型之一，但全地区坡耕地37819.7hm2，这些坡耕地由于水热条件、耕层和坡度限制，不仅产量低，绝大多数属靠天吃饭的望天地，抗御自然灾害的能力极为低下，同时都处于生态脆弱地带，极易造成水土流失，如果继续耕作，将会给生态环境带来不可估量的破坏。同时，昌都地区也是典型的"江河源"、"生态源"，这里的生态植被一旦被破坏，水土流失将更加严重，也更不易恢复。因
- Abstract:
- Changdu area is very important for its geographical position.Its average altitude is above 3 500 m.Alp and tableland are the basic physiognomy.Grassland is one of the most important land-use types in this area.But the cultivated land holding 37 819.7 hm2 has many disadvantages suchas low production, weak resistance to natural calamity due to the limits of its water-heat condition, cultivated layer and slope.It is vulnerable to soil erosion.The losses will be beyond measure if cultivated continuously.Furthermore, Changdu area is the typical "river source" and "ecology source".Once the balance is destroyed, soil erosion will be more serious and the vegetation cannot recover.So carrying out the project of returning farmland to forest and grassland is very significant to develop the animal husbandry and protect the environment.
参考文献/References:
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[2] 中国科学院青藏高原综合科学考察队.西藏气候[M].北京:科学出版社.1984.90-132, 212-221.
[3] 李硕, 李伟, 左伟, 等.西藏那曲牧区雪灾损失的多因子灰色系统分析[J].中国沙漠, 2000, 20(4):430-433.
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备注/Memo
收稿日期:2003-2-20。
作者简介:贾生海（1963- ），男，甘肃省武威市人，甘肃农业大学水利水电工程系副教授，毕业于西北农林科技大学水利系，主要从事农业水利工程、水保生态方面的教学和研究工作.