To quantize the difficulty level of dust production on the surface of different types of farmland,the Marticorena threshold frictional velocity pattern was used in this study to simulate the dust threshold frictional ...To quantize the difficulty level of dust production on the surface of different types of farmland,the Marticorena threshold frictional velocity pattern was used in this study to simulate the dust threshold frictional velocity.The results showed that the dust threshold frictional velocity of desertification farmland was 7.39cm/s,while it was 29.05 cm/s after the wheat harvested and the farmland ploughed; the turning green period was 46.85 cm/s; shooting period was 98.93 cm/s,the uncovered and the establishment period of fruit tree farmland was 26.0 and 139.15 cm/s.It was concluded that,bare desertification farmland could be changed into source of dust release easier.展开更多
对围绕着加利福尼亚的五个大地震地区的三维 P 波速度模式的研究,导致了对断层性能与在易震深度处断层的岩石的介质特性之间关系的认识,高力矩释放地区显示出与高地震速度相关,而破裂的初始或破裂的终止可能与低地震速度相联系。这种关...对围绕着加利福尼亚的五个大地震地区的三维 P 波速度模式的研究,导致了对断层性能与在易震深度处断层的岩石的介质特性之间关系的认识,高力矩释放地区显示出与高地震速度相关,而破裂的初始或破裂的终止可能与低地震速度相联系。这种关系可以理解为什么断层可以被分割为各自独立破坏的段,并表明我们能够增进对预测地震以及强地面运动的能力的认识。断层显示的特性从无震蠕动到大地震引起的脆性破裂。由于沿着某个断层长度的这些变化,可以把断层分割为各自独立破坏的段落。为了研究支配着这些变化的机制,对围绕着加利福尼亚5个中强地震的区划,我们确定了该地区的三维(3D)P 波速度(V_P)模式。展开更多
文摘To quantize the difficulty level of dust production on the surface of different types of farmland,the Marticorena threshold frictional velocity pattern was used in this study to simulate the dust threshold frictional velocity.The results showed that the dust threshold frictional velocity of desertification farmland was 7.39cm/s,while it was 29.05 cm/s after the wheat harvested and the farmland ploughed; the turning green period was 46.85 cm/s; shooting period was 98.93 cm/s,the uncovered and the establishment period of fruit tree farmland was 26.0 and 139.15 cm/s.It was concluded that,bare desertification farmland could be changed into source of dust release easier.
文摘对围绕着加利福尼亚的五个大地震地区的三维 P 波速度模式的研究,导致了对断层性能与在易震深度处断层的岩石的介质特性之间关系的认识,高力矩释放地区显示出与高地震速度相关,而破裂的初始或破裂的终止可能与低地震速度相联系。这种关系可以理解为什么断层可以被分割为各自独立破坏的段,并表明我们能够增进对预测地震以及强地面运动的能力的认识。断层显示的特性从无震蠕动到大地震引起的脆性破裂。由于沿着某个断层长度的这些变化,可以把断层分割为各自独立破坏的段落。为了研究支配着这些变化的机制,对围绕着加利福尼亚5个中强地震的区划,我们确定了该地区的三维(3D)P 波速度(V_P)模式。
