Meteorological stations in Northwest China are surrounded by large proportions of cultivated land.The relations between the change of surface wind speed and the cultivated land fractions(CF)within a 4
为定量揭示三峡工程蓄放过程中,库区水位变化下支流回水区水动力特征,于2015 年逐月在三峡水库腹心区支流朱衣河及毗邻长江干流采集水样,进行氢、氧同位素分析测试及相关理化参数分析,利用二源线性混合模型计算干-支流相互作用过程中的水团混合贡献。
北京新机场位于北京市大兴区榆垡镇、礼贤镇以及河北廊坊广阳区之间,以新机场为核心的新航城面积预计将达到300km2,年用水量约1亿m3.本文系统分析了新航城区域水资源特点,评价了新航城地区水资源量,结合新航城未来发展格局和功能定位,分析了新航城水资源安全保障方面面临的挑战,确定了水资源配置原则,提出了综合统筹本地水、南水北调水、非常规水的新航城地区水安全保障策略.
无人机遥感技术具有数据采集灵活、低成本且可快速获取超高分辨率影像的特色,在我国灌区信息化建设中具有广泛的应用前景。本文通过介绍无人机遥感系统的组成及特点,从灌区信息化应用的角度介绍了无人机遥感系统在灌区种植结构快速分类、遥感ET监测、输配水系统优化、摄影测量及水文模型应用等方面的应用前景。
It is very important for regional agricultural water management by researching the relationship between water consumption and yield,and proposing the optimal irrigation schedule.
Timely,accurate estimation of land surface water cycle process has great importance in drought estimation,irrigation management and water resources comprehensive utilization.
Most of the paddy rice in Sanjiang Plain is irrigated with groundwater.In recent years water requirement is increasing with the rapid increase of paddy field while groundwater table is falling continu
Trends,mutations and periodicity of precipitation variationin the Upper Yellow River Basin(UYRB)were studied using a fitted liner model,Mann-Kendall test,moving t-test and Morlet wavelet based on the
An improved subsurface drainage with characteristics of less land occupied and reasonable flow rate drained was presented to overcome the disadvantage of small flow rate of conventional subsurface pip
研究生教育水平是一个国家教育和科技发展水平的重要标志,高效的研究生管理是研究生教育水平稳步提升的有力保障。随着招生数量增多,研究生类型的复杂性上升,教学资源日益紧缺,传统的研究生管理模式越来越难以满足需求。