【摘 要】
：
Dam construction is one of the main factors to change sediment dynamics which in turn possiblycause river degradation or aggradation downstream.The main obj
【机 构】
：
Department of Geography,National University of Singapore,Singapore 119260
【出 处】
：
The 6th International Symposium on Larger Asian River(第六届亚洲大
论文部分内容阅读
Dam construction is one of the main factors to change sediment dynamics which in turn possiblycause river degradation or aggradation downstream.The main objective of this work is toexamine the downstream sediment budget,as affected by the dams constructed at the upperstream of the lower reach of Red River.The results show that the annual sediment load along thelower reach of the Red River at Son Tay has slightly declined from 121 Mt/yr to 114 Mt/yr afterthe construction of the first dam (Thac Ba reservoir) in the tributary of the Lo River (upper SonTay) in 1972.
其他文献
Panch Pokhari is a well known alpine lake series which includes five lakes (in Nepali,Panch =Five,Pokhari =Lake).The lakes are situated at an elevation of 4
有调查表明,长寿地区的黑豆中所含的微量元素,远比其他地区高,尤其是硒和钴的含量更高.而“法制黑豆”是清宫中的药膳食疗方,相传慈禧太后平时爱吃这种“法制黑豆”,因而年逾
随着现代社会发展,人们的生活方式发生了天翻地覆的改变,有些行为严重违背了中医理论,是对身体的极大摧残.比如,现代人性观念开放,很多人的房事比较频繁,性生活也逐渐低龄化.
Soil erosion has become a critical environmental problem due to its significant influences on river morphology,agricultural production and material transpor
秋高气爽,然而打喷嚏、流鼻涕的人依然逐渐多了起来.这是为什么呢?rn原来,这种情况是秋季过敏性鼻炎高发的表现.秋季空气干燥,昼夜温差大,风力也比较大,许多植物种子、枯草、
随着冬季的来临,我国或将迎来流感+新冠病毒“双流行”叠加的严峻形势,流感将成为影响新冠疫情防控的关键因素.疾控专家介绍,接种流感疫苗是预防流感最有效的手段,药物预防不
Variation in sediment flux of the Yellow River has received considerable attention due to its drastic reduction during past several decades.This paper prese
冬虫夏草有很高的药用价值,具有补虚损、益肾精和止血化痰等功效,常用于治疗气喘、咯血、汗多、阳痿遗精、腰膝酸痛等.现代药理研究发现,冬虫夏草具有调节免疫、对抗心肌缺血
“探究”是幼儿的天性,是幼儿学习的主要方式和活动方式,幼儿的探究性学习活动,又是在教师的指导下动手操作、动脑思考.运用多种方式表达自己的发现与感受,主动探究周围事物
近两年,网络上有不少关于多囊卵巢综合征的流言,传说患了这种病基本就不孕了,还会患糖尿病,甚至是子宫内膜癌.这些流言到底真假几何?rn多囊卵巢综合征存在的危害rn近年来,流