茅坪“国门”的历史及其价值

边界是国家主权的象征。位于中越边界马关段的茅坪“国门”，建于抗日战争时期，至今已有70多年的历史。茅坪国门既是抗日战争在文山地区的历史见证和不可移动的历史文物，又是中越两国边界的实物“界碑”，对解决两国边界争端，意义非同寻常，其价值不可估量。     

基于ALOS遥感影像线性体定量分析

遥感地质研究的定量分析能够给出客观、精确的数据和结论.利用ALOS高分辨率遥感影像,以昭通毛坪铅锌矿区线性体解译为基础,进行了线性体长度、方位、频度的常规统计分析,通过制作线性体方位玫瑰花图和等密度图,清晰展示了研究区线性体的优势方向和空间分布规律,得到了区内以北东(NE)向断裂构造为主的定量证据.并在此基础上,提出了线性体长度分级评价方法,探讨了更具地质意义的加权统计分析.     

Modeling on runoff concentration caused by rainfall on hillslopes and application in Maoping slope

Based on the fact that the concentration flowlines of overland flow depend on the surface landform of hillslope, a kinematic wave model was developed for simulating runoff generation and flow concentration caused by rainfall on hillslopes. The model-simulated results agree well with the experimental observations. Applying the model to the practical case of Maoping slope, we obtained the characteristics of runoff generation and infiltration on the slope. Especially, the simulated results adequately reflected the confluent pattern of surface runoff, which offers a scientific foundation for designing the drainage engineering on the Maoping slope.