摘要
利用河西走廊石羊河流域的矿产分布情况、岩性特征、地质构造和地下水分布特征等资料,分析了该区主要地质灾害的特点和成因。结果表明,该流域南部山区主要地质灾害以地面塌陷、滑坡、崩塌、泥石流、地裂缝等为主,主要原因是不合理开采矿山以及不稳定地质结构和软弱岩性在强降水等触发作用下形成的;北部民勤主要地质灾害以荒漠化、水土流失和盐渍化等为主,主要原因是该区三面被沙漠包围,沙化区面积和沙层厚度较大,地下水埋深浅、矿化度高,沙尘暴频繁,自然植被遭到破坏,超量开采地下水,利用高矿化度水灌溉等,并根据不同灾害形成机制和特点,提出了减少地质灾害发生的综合治理措施。
Using the data of mine distribution conditions, rock layer characteristic, geology structure and underwater distribution characteristic etc. of Shiyang River basin in Hexi Corridor, the main geology disaster characteristics and causes in the region were analyzed. The results indicated that main geological disasters were ground landslide, avalanche, mud - rock flow, crack etc. in the southern mountain area of Shiyang River basin, which were caused by mining improperly and strong rainfall caused ground sinking, coast, mudslide etc. Main geological disasters in the northern Minqin County of the lower reaches of Shiyang River basin, which were caused by desertification, soil erosion and salinification etc., the region was surrounded by the desert, the sand area was big, the sand layer thickness was deep, groundwater was shallow, hardness index was high , sandstorm was frequent, nature vegetation was destroyed, groundwater was overused, Mines the high hardness index water irrigation and excessive reclamation etc. According to different disaster form mechanisms and characteristics, all - around management measures were put forward to reduce the happen of geology disasters.
出处
《安徽农业科学》
CAS
北大核心
2009年第15期7088-7091,共4页
Journal of Anhui Agricultural Sciences
基金
甘肃省气象局第四批"十人计划"项目资助
关键词
石羊河流域
地质灾害
分布特征
成因分析
治理措施
Shiyang River basin
Geology disaster
Distribution characteristic
Cause analysis
Management measure
