【摘 要】
：
The lateral distributions of depth-averaged velocity in open compound channels with emerged and submerged vegetated floodplains were analyzed based on the analytical solution of the depth-integrated R
【出 处】
：
Chinese Geographical Science
论文部分内容阅读
The lateral distributions of depth-averaged velocity in open compound channels with emerged and submerged vegetated floodplains were analyzed based on the analytical solution of the depth-integrated Reynolds-Averaged Navier-Stokes equation with a term
其他文献
The sub-pixel impervious surface percentage(SPIS) is the fraction of impervious surface area in one pixel,and it is an important indicator of urbanization.Using remote sensing data,the spatial distrib
Estuarial saline wetlands have been recognized as a vital role in CO_2 cycling.However,insufficient attention has been paid to estimating CO_2 fluxes from estuarial saline wetlands.In this study,the s
黑河下游额济纳旗气候极端干旱,生态环境十分脆弱,该区域胡杨(Populus euphratica)河岸林植被覆盖分类与植被结构参数提取是生态环境评价、植被变化分析、区域生态水文过程研究的基础。利用机载LiDAR数据,综合多种处理方法,进行植被覆盖分类与植被结构参数提取,分析了胡杨河岸林的分布和生长状况。结果表明,植被覆盖分类总体精度和Kappa系数分别为95.86%和0.91,整体分类精度高,能够
荒漠植物在自然生境中同时遭受多种环境因子的胁迫,但植物对多重胁迫因子的应答响应机理目前仍然未知。利用数字基因表达谱技术分析了荒漠植物红砂(Reaumuria soongorica)在干旱、UV-B辐射以及干旱和UV-B辐射共胁迫下基因在转录水平的表达响应。结果显示:胁迫处理的材料与对照材料相比,差异表达的基因有上调表达基因和下调表达基因,且不同胁迫中下调表达基因总数多于上调的。双重胁迫与单因子胁迫
利用采集自青海省治多县立新乡的大果圆柏(Juniperus tibetica)建立树轮宽度标准化年表(STD)。相关分析表明,长江源区4—6月帕尔默干旱指数(PDSI)与树轮宽度标准化年表具有良好的相关性,相关系数达到0.597(建模期,1960—2012年)。利用标准化年表重建了长江源区过去407年的4—6月PDSI指数变化,重建方程方差解释量达36.0%,且方程稳定。重建的4—6月PDSI指数
In this study, we explored spatial patterns and the temporal trends in high-temperature events(HTEs) for the mainland of China during 1961–2014 based on a daily-maximum surface-air-temperature dataset
利用陆面过程模式BATS,引入地表发射率及两种大气发射率参数化方案,同时引入不同的地表粗糙度参数化方案,对比各种参数化方案对沙漠下垫面地面温度及能量收支的模拟状况。结果表明:采用Van Bavel等发展的地表发射率及Chung等发展的大气发射率方案可以明显改进地面温度及向上长波辐射的模拟,Chung等方案在夜间与正午的模拟效果更好,减小了1℃左右的地面温度模拟偏差,减小了10 W·m~(-2)左右
While climate is an important factor attracting tourists to certain destinations,it can also motivate people residing in a country with a harsh climate to move to another location.By applying X-12 dec
选取张掖气象站1961—2014年逐日降水观测资料,采用线性趋势分析和Mann-kendall检验等方法分析了张掖市年降水量、年最大降水量、冬季降水量和其他季节降水量的变化趋势和突变特征。结果表明:1961—2014年张掖市年降水量总体呈增加趋势,其中1982—1984、1995—1996、2007—2013年降水量增加趋势显著。年最大降水量和冬季降水量增加趋势明显,分别发生了6次和1次突变,其中
Since the late 20th century,China and India have experienced rapid growth.Their large-scale urbanization and industrialization have had an important impact on the global economy.China and India are As