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解决“征地难”问题的几点思考 被引量:1
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作者 张誉夫 《贺州学院学报》 2012年第3期123-125,共3页
随着我国城市化进程的加快和工业的发展,越来越多的农村集体土地面临着被征用的问题,而"征地难"也成为"天下第一难"。解决"征地难"问题一要切实关注农民利益;二要重塑信任体系;三要高度重视农村和农民的... 随着我国城市化进程的加快和工业的发展,越来越多的农村集体土地面临着被征用的问题,而"征地难"也成为"天下第一难"。解决"征地难"问题一要切实关注农民利益;二要重塑信任体系;三要高度重视农村和农民的教育问题。 展开更多
关键词 城市化 农村 集体土地 “征地难”
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A catastrophic debris flow in the Wenchuan Earthquake area,July 2013:characteristics,formation,and risk reduction 被引量:2
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作者 HU Tao HUANG Run-qiu 《Journal of Mountain Science》 SCIE CSCD 2017年第1期15-30,共16页
In the Wenchuan Earthquake area,many co-seismic landslides formed blocking-dams in debris flow channels. This blocking and bursting of landslide dams amplifies the debris flow scale and results in severe catastrophes.... In the Wenchuan Earthquake area,many co-seismic landslides formed blocking-dams in debris flow channels. This blocking and bursting of landslide dams amplifies the debris flow scale and results in severe catastrophes. The catastrophic debris flow that occurred in Qipan gully(Wenchuan,Southwest China) on July 11,2013 was caused by intense rainfall and upstream cascading bursting of landslide dams. To gain an understanding of the processes of dam bursting and subsequent debris flow scale amplification effect,we attempted to estimate the bursting debris flow peak discharges along the main gully and analyzed the scale amplification process. The results showed that the antecedent and triggering rainfalls for 11 July debris flow event were 88.0 mm and 21.6 mm,respectively. The event highlights the fact that lower rainfall intensity can trigger debris flows after the earthquake. Calculations of the debris flow peak discharge showed that the peak discharges after the dams-bursting were 1.17–1.69 times greater than the upstream peak discharge. The peak discharge at the gully outlet reached 2553 m^3/s which was amplified by 4.76 times in comparison with the initial peak discharge in the upstream. To mitigate debris flow disasters,a new drainage channel with a trapezoidal V-shaped cross section was proposed. The characteristic lengths(h1 and h2) under optimal hydraulic conditions were calculated as 4.50 m and 0.90 m,respectively. 展开更多
关键词 Disaster characteristics Formation mechanisms Risk reduction Debris flow Wenchuan Earthquake Blocking dam
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