摘要
对塔里木沙漠公路不同地貌部位的高立式沙障的阻沙效果分析表明 :垄间平地路段高立式沙障可以在 2～ 3年内有效阻止防沙体系外的沙子进入体系内 ,不但能有效阻止体系外风沙流进入体系内 ,而且降低了体系外沙丘移入体系内的速度 ;垄体、垭口和过渡区路段的高立式沙障 ,仅在短时间内有效阻止体系外风沙流进入体系内 ,不能使体系外沙丘移入体系内的速度降低 ;垄间新月型沙丘 (链 )路段的高立式沙障能明显降低体系外沙丘移入体系内的速度 ,使体系外沙丘遇高立式沙障后顺高立式沙障方向移动 ,但最终能越过高立式沙障进入体系内 ;在垄间线形沙丘分布路段 ,丘体附近的高立式沙障在 2～ 3年内既被埋没 ,其他地段的高立式沙障设置 4～ 5年后才能被埋没。
The Tarim Desert Highway was started its building in 1992 and has been open to traffic since 1996. In order to ensure an unblocked traffic of the highway, a sand drift control system combined by sand obstruction with sand fixing is built along the highway. It is paid a great attention to that whether the system is effective or not within the designed period. This paper discusses the sand obstructiong effect of the high sandbreaks in the different morphologic sections along the Tarim Desert Highway. The results show that the system can not only effectively obstruct sand drift within the system, but also can reduce the speed of sand movement out of the system along the road sections between the sandridges within 2～3 year. The high sandbreaks along the road sections in the areas of sandridges and the sandridge passes as well as in the transitional zones can effectively obstruct sand drift during a short period only, and can not reduce the moving speed of the dunes from the outside to the inside of the system. The high sandbreaks along the road sections in the areas of barchans (or chains) can obviously reduce the moving speed of the dunes from the outside to the inside of the system, the dunes, however, can surmount the sandbreaks to enter the system at last. The high sandbreaks near the linear dunes between the sandridges can be submerges within 2～3 years.
出处
《干旱区地理》
CSCD
北大核心
2000年第3期227-232,共6页
Arid Land Geography
关键词
塔里木沙漠公路
高立式沙障
地貌部位
Tarim Desert Highway
high sandbreak
morphologic section
sand obstructiong effect.
