过河

嘻嘻和他的同学准备到离姑姑家不远的大山上去拍摄雪景。姑姑的家在一条大河的对岸,虽然是冬季,河水却丝毫没有结冰的迹象。一路上,他     

汾河水畔钓赛美——记2012年“碧海·丸九杯”钓鱼邀请赛（山西赛区）

2012年5月27日,由北京碧海钓具有限公司、日本丸九株式会社主办,山西省钓鱼协会、太原大江文体用品总汇承办的2012年“碧海·丸九杯”钓鱼邀请赛在太原市尖草坪区柴村桥垂钓中心圆满结束。     

江河水涨好钓鱼

＂谷雨＂过后,雨量增多,给长江流域及其相通的大小江河带来洪水上涨的趋势。由于洪水的冲涮,许多小虫、蚯蚓、沙虫、嫩草以及腐烂植被浸泡在水中,成为鱼儿的丰盛佳肴,这也给广大钓鱼人带来了机会。一、选择钓点钓谚云：＂三分钓技,七分钓位。＂江河涨水,钓位的选择是钓获丰厚的关键。     

欣赏是一种美德

从前有两个年轻人先后从沙漠来到绿洲。他们都遇到了一位老人,问了老人相同的问题:这里如何?老人反问:你们的家乡如何?前者答道:糟透了!于是老人劝他离开这里。而后者说:一切都很美!老人对他说:这儿和你的家乡一样美!老人截然相反的回答令许多人费解。当人们问老人原因时,老人只说了一句:你想寻找什么,你就会找到什么。人人都渴望被欣赏,得到欣赏就是得到别人的尊重。有人说,欣赏与被欣赏是到动的。欣赏者大多具有愉悦、仁爱的心愿,被欣赏者也常常产生自尊、奋进的力量。     

布依娃娃唱山歌

\刺黎花一朵朵，布依娃娃唱山歌。歌声飞过高山顶，树上结满金果果。歌声飞过大坝子，田野绿茵翻浪波。唯!歌声起歌声落，青山绿水更蓬勃。小河水顺山梭刺，布依娃娃唱山歌。歌声飞进校园里，画眉阳雀笑呵呵。歌如春雨随风洒，飘香流蜜醉心窝。唯!歌甜美歌柔和，美透布家新生活     

秋末冬初夜钓江鳕

10月初到11月中旬,新疆北部已进入秋末冬初的季节。这段时间,树叶已落尽,草早已枯黄,河水清澈而又寒冷,河水温度往往只有2～4℃,较小的支流往往近岸已结薄冰。这时的鱼多已躲在深处,少吃少动,白天很难钓上什么鱼,但这一季节的晚上却是钓江鳕的好时间。江鳕鱼是冷水鱼,冬季是摄食     

故乡的小河

人真是奇怪得很,许多新近亲历的事情在脑子里荡然无存,而许多童年的往事,却像一张张照片,总是能够冲破空间的万水千山,时间的风雨雷电,在脑海的显影液里越来越清晰,再也无法抹去.故乡的小河就是我脑海里永存的组照.……     

家乡的生态往事(一)

我老家是赤峰市松山区西部的一个偏僻小山村,西部和南部与河北省围场县毗邻,北与本公社(过去的称呼)东沟大队接壤.全大队(过去的称呼)辖九个生产队,一千多口人,大的生产队约二百多人,小的生产队在百人左右.村庄大都是坐落在两山夹一沟的沟底部,水浇地极少,95%都是山坡地,纯属靠天吃饭的老天爷农业.     

Numerical simulation of pollutant diffusion and decay process after a walter pollution incident in the Three Gorges Reservoir

We established a hydrodynamic model to simulate the pollutant transport and decay process in the case of a pollution incident in the sections of the Yangtze and the Jialing passing through the city area of Chongqing. The Boussinesq assumptions and the Navier-Stokes equations of incompressible fluid were applied to setting up the pollutant diffusion equations and the equations for the decay process. E. coli was taken as the example pollutant, and chloride dosage, light, temperature and ultraviolet intensity were considered in the equations for bacterial decay process. The calculated values of the fluid velocities in the two rivers agree well with corresponding measured results, indicating an ideal accuracy of the model. In simulation, the concentration of E. coli in water was assumed to be zero before the accident. The upriver boundary velocity was (1.35 m/s for the Jialing flow and 1.75 m/s for the Yangtze flow, and the downriver boundary was water depth set at 0. Simulation results show that the bacteria are transported downstream along the riverbank. A long and narrow pollutant belt develops at 12 h after the start of the accident ascribed to the quick longitudinal transfer. After the pollution sources are cut off, the pollutant concentration decreases slowly, mostly by advection and diffusion, suggesting inadequate self-purification ability of the rivers and the necessity of effective decontaminating measures in the case of a pollution incident. The model can be a useful tool for understanding the polluting situations of an improper discharge incident and evaluating the effects of decontaminating measures for the water body of the Three Gorges Reservoir.     

大河汤汤

一一切都在静谧中孕育。天以最辽远的蓝色贮满云朵,大地把最广阔的一片高地停在那儿,没有耕耘,没有喧哗,甚至没有人迹,只有千年万年固守的静默。雪山蹲在天穹下,静静地,静静地思考着时间。那一条银亮亮的河流,仿佛从它的沉思中