摘要
根据高陵渭河河漫滩沉积中72个样品的颗粒分析和史书记载的年代资料,研究了西安高陵渭河距今1400—1100年间洪水深度、洪水变化阶段和气候变化.资料表明,高陵渭河距今1400—1100年间河漫滩沉积物厚度为3 4m左右,由粉细砂层和中粗砂层构成,至少包括9个明显的沉积层,粗细交替变化明显;这9个沉积层清楚地反映了9个明显的大洪水阶段;在唐代距今1400—1100年之间的时期,渭河洪水深度常达4m以上;当时洪水流量比现代大,降水量比现代多.
On the basis of grain size analyses for 72 samples of river deposit and chronology material recorded by historical books, flood depth, flood level distribution and climatic change between 1400—1100 years in Gaoling of Xi′an are studied. The material shows that Weihe River deposit is 3.4 m in thickness and consists of silt layers, silver sand layers and middle-coarse sand layers during a period of the Tang Dynasity between 1400—1100 years; 9 deposit layers occurred and alternations between silt sand layer and middle-coarse sand layer are clear, which indicates 9 stages of large scale flood; flood depth often was more than 4m, and flood level is higher, volume of flood flow is greater and rainfall is richer at that time than at present.
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第4期103-107,共5页
Journal of Shaanxi Normal University：Natural Science Edition
基金
陕西师范大学历史地理国家重点学科项目(SNNUHG04007)
国际地质对比计划项目(IGCP448)
