Results 1 to 10 of about 8,178 (188)
Construction of Ecological Security Pattern in Ecological Barrier Zone of Loess Plateau Based on “Importance-Sensitivity-Landscape Features” [PDF]
, 2022 [Objective] The relationship between ecological spatial network structure and soil conservation was analyzed in order to provide countermeasures and suggestions for improving ecosystem services in the Loess Plateau barrier region.
Liu Hongjun +5 more
core +1 more source
工程技术与管理, 2021 在对塔河油田三叠系砂岩储层岩心进行不同驱替体积倍数的敏感性实验基础上，结合岩心核磁共振实验、扫描电镜等方法对实验前后岩心孔隙结构特征进行分析，研究了塔河油田砂岩储层经历高倍数流体冲刷后储层岩石孔隙结构变化规律及原因。结果表明，随着驱替倍数增加，岩心渗透率总体呈下降趋势，水驱渗透率平均减少近57.9%；水驱后岩石骨架结构在扫描电镜下观察未发生明显变化；核磁共振实验反映出流体长期冲刷后岩心的孔隙半径分布呈现出向孔隙半径较大处移动，且岩心孔径较小的孔隙（孔隙半径＜1μm）有着一定程度地减少，孔径较大的孔隙 ...
晓宇 张 +3 more
semanticscholar +1 more source
Effects of Different Micro Rainwater Harvesting Measures on Safflower Growth [PDF]
, 2023 [Objective] The cultivation of safflower with micro rainwater harvesting technology on the hillslopes of the temperate desert grassland in Yili Valley was evaluated in order to provide technical support for dryland cultivation of safflower and for ...
Hu Guiqing +3 more
core +1 more source
Soil and Water Conservation and Ecological Benefits of Forest Ecosystem in New Urban Karst Areas of Central Guizhou Province [PDF]
, 2022 [Objective] Soil and water conservation and ecological benefits of forest ecosystem in the new urban karst areas of Guanshanhu District, Guiyang City in Central Guizhou Province were studied to scientifically evaluate the achievements of ecological ...
Dai Zhengjiao +6 more
core +1 more source
城市建设理论研究—园林景观, 2022 颐和园总占地面积3.08km2，其中水面面积约2.3km2，占全园面积近3/4，属于典型的大型自然山水园林，其园林水系为京西区域整体水系结构的重要组成部分，区域尺度特征明显。同时，颐和园在空间及功能区域划分上又可进一步分为东侧宫殿区、北部山地园林区，南部水体景观区等区域，其中涉及的建筑院落、园中园等不计其数，场地尺度下的理水模式种类多样。以颐和园为案例进行分析，即可兼顾到多种理水尺度类型，论文从颐和园的雨水排放、雨水径流和驳岸功能形式出发，兼顾径流沉淀过程，阐述其理水的技艺融合特征 ...
庄 怡然
semanticscholar +1 more source
Monitoring and Evaluating Carbon Sink Capacity for Comprehensive Management of Soil and Water Conservation in Small Watersheds [PDF]
, 2023 [Objective] The carbon sinks of soil and vegetation were monitored and evaluated in order to provide technology and methodology for implementing dynamic monitoring and evaluation of carbon sinks for soil and water conservation projects, and to provide ...
Cheng Hui +6 more
core +1 more source
Effects of Human Activities on Terrestrial Vegetation Coverage Change of Poyang Lake Basin During 2000—2020 [PDF]
, 2022 [Objective] The mechanism on how human activities affect vegetation dynamics was studied in order to promote the healthy development of terrestrial ecosystems.
Liu Jia +4 more
core +1 more source
水电水利, 2020 径流预测对于区域水资源的综合开发利用、合理配置、高效管理具有重要指导作用。月径流序列是典型的非平稳时间序列,NAR神经网络是一种基于时间序列的动态神经网络预测模型,在解决一些非线性,或者人们对其本质了解还不够清楚的复杂问题上表现良好,表现出了良好的智能特性。本文在某水文站50年历史月径流量的基础上,建立NAR神经网络模型对该水文站未来24个月的径流量进行预测,预测结果的确定性系数为0.8367,预测方案的有效性为乙等,对于该区域的水文工作的开展具有重要现实意义。
依韬 贺
semanticscholar +1 more source
, 2019 引江济淮工程是淮河流域水资源战略配置及巢湖和淮河水环境综合治理的重要措施,并列入国家加快推进的172项重大水利工程。引江济淮工程派河段是按照丰、枯水期严格设计的,派河水质不仅直接影响巢湖口的水质,还将间接影响淮河水质。结合派河现状水文、水质条件,采用明槽恒定均匀流公式预测了引江济淮工程对派河规划年水文情势的影响,预测结果表明:工程实施后,派河水位将升高1. 01～2. 32 mm,流速将增大0. 24～0.
刘花台 +5 more
core +1 more source
Shuitu Baochi Xuebao, 2020 以北京市漫水河流域为研究对象，对漫水河1956-2016年年降雨量、年径流系数变化特征及径流系数突变性进行分析，以2000-2016年代表现状下垫面条件，采用主成分分析法分析了时段降雨量和年降雨量对年径流系数的影响，并建立了年径流系数与主要降雨因子的线性主成分回归模型及基于LM（Levenberg—Marquardt）算法的BP神经网络模型。结果表明：漫水河流域年径流系数在过去的61年间呈极显著下降趋势，年径流系数从1956年到上世纪70年代初、上世纪70年代末到80年代末 ...
王少丽 +5 more
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