昆明市地面沉降发展过程及其特征  

Development Process and Characteristics of Land Subsidence in Kunming

作　　者：姜朝松[1] 邵德晟[1] 樊友心[1] 胡耀雄[1] 周瑞琦[1] 

机构地区：[1]云南省地震局,云南昆明650041

出　　处：《地震研究》2001年第1期55-60,共6页Journal of Seismological Research

基　　金：云南省人民政府指令项目 ;云南省应用基础研究基金

摘　　要：利用 1979～ 1998年昆明市地面沉降监测资料分析昆明市南部地区 ,即二环南路以南地区大面积地面沉降。该地区形成两个明显的漏斗形沉降区 ,一个是以小板桥为中心的沉降区 ,其中在朱家村、巫家坝机场、广卫村、小喜村、六甲、官渡等地较为明显 ,在沉降中心 (小板桥 )沉降量达 2 2 7 5mm (1985～ 1998年 ) ,平均下沉速率在 17mm/a左右 ,最大达 30 0 0mm/a ;另一个沉降中心在海埂以北的河尾村、渔户村一带地区 ,沉降中心的沉降量达 10 0 4mm (1993～ 1997年 ) ,下沉速率达到 2 5 1mm/a。对昆明市地面沉降现象与古滇池松软的湖相沉积、局部地区的地下水资源长期超采以及该地区强震活动的因果关系进行了初步探讨。The land subsidence in south Kunming,in the most of area south of the Second Ring Road,is analyzed using the monitoring data of land subsidence in Kunming from 1979 to 1998.There are the two subsidence areas in shape of funnel in the south Kunming;the one took Xiaobanqiao as the subsidence center with the subsidence value of up to 227 5 mm(1985～1998);evident subsidence occurred in Zhujiacun,Wujiaba airport,Guangweicun,Xiaosicun,Liujia and Guandu with the average rate of about 17 mm/a and the maximum subsidence of up to 30 0 mm/a;The other subsidence center was located in the area around Heweicun and Yunhucun north of Haigeng,with the subsidence value of up to 100 4 mm(1993～1997)and the subsidence rate of 25 1 mm/a.Causal relation between the land subsidence in Kunming and soft lake deposit in Paleo-Dianchi,over-extraction of ground water for a long time in some areas and strong seismicity is preliminarily studied.

关 键 词：昆明市 地面沉降 沉降中心 沉降速率 原因 地下水超采 地震活动 

分 类 号：P642.26[天文地球—工程地质学]