The wetland is “The kidney of the earth”.
长江流域湿地主要集中在中游平原湖区,三峡建库后可调蓄长江上游洪水,调控中游下泄流量及水文情势,有利于中游平原湖区防汛抗旱、防涝排渍工作,促进湿地保护,防止土壤潜育化与沼泽化。
Based on characteristics of the eco-environment in the middle reaches of the Heihe River and PSP model,9 evaluation index systems that reflect eco-environmental frangibility while being isolated from each other were selected to form a model for integrated evaluation of eco-environment fragility of the studied area using the matter-elements theory and information entropy.
针对黑河中游生态环境特点,基于PSR模型,选取9项能反映其生态环境脆弱性而彼此之间相互独立的评价指标体系,采用物元可拓理论和熵权法构建生态环境脆弱性的综合评判模型,对黑河中游各地区生态环境脆弱性进行了评价。
A major monitoring area was selected in Jinta of the middle reaches of the Heihe River .
利用 1990年和 2 0 0 0年的TM遥感资料 ,在经过定标、几何校正和图像增强等图像处理的基础上对土地覆盖类型进行解译 ,从而实现黑河中游金塔地区的生态环境遥感动态监测 。
Based on the long-term hydrologic observations in study area,the model of the estimation of groundwater budget at the representative irrigation area in the middle reaches of the Heihe River was established in this paper.
根据对研究区多年的水文地质观测资料的分析和研究,建立了黑河中游典型灌区地下水水资源总均衡模型,选取了黑河干流具有代表性的平川、板桥、鸭暖和蓼泉灌区,对地下水均衡模型中的补给项及排泄项的主要变量分别进行了估算,结果表明:各灌区均衡期内地下水动态资料计算的均衡期始末地下水储存量变化与模型计算的均衡差基本相近,其相对误差为-17。
Based on experiments conducted in an intercropping field in Zhangye Oasis in the middle reaches of Heihe River in 2004,the characteristics of radiation budget are analyzed.
利用布设在黑河流域中游的张掖绿洲区的一套自动气象观测系统在2004年作物生长期内的完整资料,分析了黑河中游春小麦和玉米间作农田生态系统的辐射收支,在此基础上选用波文比能量平衡法(BREB)进行了能量平衡计算。
The historical datum and nowadays' records have manifested clearly that the frequency and situation of drought corresponded basically to the catastrophic flood in the middle reaches of Yangtze River,where is the area that the flood took place frequently,also the area that the drought took place frequently.
历史资料和现代记录均清楚地表明,长江中游旱灾的发生频次和灾情与洪灾基本相当,中下游地区既是水灾的高发区,又是旱灾高发区。
The wetland in the middle reaches of Yangtze River has been greatly damaged for excess exploitation and unreasonable utilization.
长江中游湿地由于人类对其不合理的开发和利用 ,遭到了极大的破坏。
Aiming at the severe condition of flood control that was caused by the phenomena of little discharge volume but higher water level in the middle reaches of Yangtze River, the dissertation analyzes the effect of the change between Jingjiang River and Dongting Lake relations, finds a main reason that caused this adverse state, and finally puts forward a solution.
针对近年来长江中游出现小流量、高水位所造成的严峻的防洪形势，本文以荆江和洞庭湖为研究对象，分析了江湖关系演变及其变化所带来的影响，找到了造成这种中小流量、高水位局面的原因，并提出了一种解决的方法。
Analysis of the rainstorm and flood in Fugu at "July 30.2003"of the middle reaches of Yellow River;
黄河中游府谷“2003.07.30”暴雨洪水分析
On the Establishing Time of the Early China in the Middle Reaches of Yellow River According to Shiji·Wudi Benji;
读《史记·五帝本纪》论黄河中游早期国家形成的时间
The periodicity and encounter probabilities of midsummer drought in the middle reaches of Yellow River were analyzed using the methods of maximumentropy spectrumanalysis and wavelet analysis according the midsummer drought index of the middle reaches of Yellow River and its sections from 1955 to 2002.
本文利用黄河中游及其分区1955~2002年盛夏干旱指数资料,采用最大熵谱分析和小波分析方法,对黄河中游盛夏干旱变化的周期性特点和各分区不同干旱等级之间的遭遇概率进行了统计分析。
Introduction to the high danger of flood disaster in the middle Yangtze River;
浅论长江中游洪灾高危险性
Research summary of regional economy in middle Yangtze River at modern times since the 1980’s;
20世纪80年代以来近代长江中游区域经济研究综述
Study on Sustainable Utilization of Wetland Resources in Middle Yangtze River Farmland;
长江中游农田湿地资源可持续利用研究