白水坑水库洪水分期过渡期研究

针对洪水分期在调度上存在的不足,提出洪水分期过渡期概念。采用模糊理论和分形理论对白水坑水库洪水分期过渡期进行了研究。结果表明,2种方法确定的洪水分期过渡期一致,可以指导水库实际调度工作。     

Differences in Organic C Mineralization Between Aerobic and Submerged Conditions in Paddy Soils of Southern Jiangsu Province, China

Moisture regime plays a crucial role in the mineralization of soil organic carbon (SOC). In this paper, the dynamics of SOC mineralization in typical paddy soils of Changshu, Jiangsu Province, China, was investigated by incubation test in laboratory. The differences in SOC mineralization under aerobic and submerged conditions of paddy soils were also studied. Results showed that the daily mineralization of SOC under different moisture regimes was significantly different in the whole incubation period, at the beginning of the incubation, it decreased quickly under aerobic condition, but increased rapidly under submerged condition, and both remained constant after 10 d of incubation. The differences in SOC mineralization were found to be mainly at the beginning period of the incubation and decreased along with the incubation time. Thus, the difference was not significantly different at the later incubation period. The respiration intensity, daily and cumulative mineralization of SOC under aerobic condition was 2.26–19.11, 0.96–2.41, and 0.96–2.41 times than those under submerged condition, respectively. Statistic analyses showed that the higher the contents of microbial biomass carbon and nitrogen, the more significant difference in respiration intensity between aerobic and submerged conditions, but the higher the contents of microbial biomass nitrogen and dissolved organic carbon, the more significant difference in daily mineralization of SOC between the two conditions. The decrease in soil microbial activity under submerged condition was the main reason leading to the decrease in respiration intensity, but the decrease in SOC mineralization was also correlated with the changes in dissolved organic carbon over the whole incubation period.     

洪峰流量频率计算中历史洪水调查的作用

采用皮尔逊Ⅲ型理论频率曲线的计算方法,分析特大洪水在推求设计洪水中的作用,说明了搞好历史洪水调查的重要性。     

清河水库洪水自动预报修正与检测方法的分析

本文采用多种模型预报方法对洪水自动预报中的误差进行了修正与检测,运用洪水预报人工干预的手段,对多种洪水预报方法进行详细的分析,对洪水自动预报进行系统的修正与检测,提高了洪水预报精度。     

基于GIS的淮河流域洪水灾害综合风险评价

基于洪水灾害风险评估基本原理,从洪水致灾因子危险性、孕灾环境稳定性及承灾体易损性出发,选取降雨、径流量、河网密度、地形、人口、经济指标等数据,利用标准化方法对各影响因子进行标准化处理,运用层次分析法确定指标因子权重,采用地理信息系统的地图代数功能及信息量统计法,得出洪水灾害综合风险等级图。结果表明：危险性等级高值区主要分布在淮河流域中西部及部分东部、东北部地区;而在北部及西北部地区,相对风险较低,为中低风险性地区。     

安定区东河灌区建筑物设计洪水分析与计算

在对定西市安定区区域暴雨特性、洪水特性进行系统分析的基础上,根据区域水文测站分布情况确定了洪水分析与计算参证站;通过对参证站实测洪水系列资料计算结果与地区经验公式法、主要站洪峰流量特征值法计算结果的比较分析,提出采用经验公式法计算设计洪水,很好地解决了东河灌区设计中建筑物设计洪水的计算问题。     

洪水过后注意做好防疫工作

近期,个别地区出现大雨到暴雨,甚至出现洪涝灾害,防汛形势异常严峻,并已严重威胁到畜禽生产安全。为确保洪水过后无大疫情,畜禽养殖场（户）一定要做好饲养管理和综合疫病防治工作,以免出现大的疫情。     

发达国家洪水保险制度与中国洪水保险模式

就美国洪水保险制度产生和建立的过程,从洪水保险基础制作、运作体制及方式、洪水保险激励与约束机制、洪水保险基金管理和洪水保险计划执行分别进行论述.并对英法等国自然灾害保险制度、洪水保险计划进行分析,对中国洪水保险模式中几种方式进行了探讨.     

洪水无情,通威有爱,献一份真诚关怀 通力合作,威力无穷,与用户共渡难关

2010年对于各位朋友而言,的确是个灾患频繁的年头。且不说4、5、6月连续三个月低温、多雨,致使整个养殖周期相比往年几乎推迟了近2个月的时间。进入7月份,又遭连天的暴雨,致使沿长江的江西、湖南、湖北、安徽等省、市灾害连连,到处传来的是淹塘毁坝、房倒屋塌,使养殖户不仅生命财产受到了危胁,而且所赖以生存的养鱼业也惨遭打击。     

陵川县积极发展无公害畜产品

夏季天气炎热、圈舍空气湿度大,是各种动物疾病的多发季节。尤其今年,北方持续的桑拿天闷热难耐,南方暴雨洪水不断。本期的疫病防制和宠物保健栏目,专门刊登了针对此季节,家畜、家禽和宠物多发疾病的文章,以期对广大读者有所帮助。随着人们对畜产品质量安全意识的不断提高,近几年,无公害畜产品、绿色畜产品已悄然踏上中国百姓的餐桌,融进了百姓的生活中。面对国际、国内对畜产品质量安全要求的新形势和市场竞争日趋激烈的新情况,我们急需加快无公害畜产品和绿色畜产品的发展步伐。本期热点关注中,王卫明的《陵川县积极发展无公害畜产品》一文,阐述了无公害畜产品和绿色畜产品发展现状、无公害畜产品和绿色畜产品发展存在的问题,并结合陵川县实际情况,提出了该县加快无公害畜产品和绿色畜产品发展应采取的措施。