Results 21 to 30 of about 18,080 (163)
Shuitu Baochi Xuebao, 2008 提出了一种地表-地下径流联合模拟的分布式水文模型,该模型综合考虑了地表径流、土壤水、地下径流之间的相互作用和水量交换,更真实地模拟了径流系统。选取太湖西苕溪流域进行了模型的应用研究,采用1km×1 km网格,就1988-2001年横塘村、范家村两水文站逐日、月实测径流资料进行径流模拟,确定了模型的基本参数。从模拟精度、参数需求、模型稳定性、水量平衡等方面分析模型的特点,研究表明:该模型参数相对简单,模拟精度较高,耦合运行稳定、快速,水量平衡分析详尽。模型可用作地表-地下径流相互作用 ...
李丽娇, 张奇
doaj
, 2007 介绍了同位素技术的原理,初步探讨并提出了同位素技术应用在气候变化对内陆河流域水循环影响研究中的思路和重点,主要包括水汽来源分析、区域降水线与蒸发线特征分析、氘盈余的分布特征及古气候信息的提取等方面。通过创新气候变化背景下的内陆河流域水循环变化的研究模式 ...
宋郁东, 毛炜峄, 陶辉, 韩俊
core
Comparative study on two drying-rewetting algorithms of groundwater model cells [PDF]
When simulating drying-rewetting process of grid cells in numerical groundwater modeling using the block-centered finite-difference approach, the models is highly probable to run into non-convergence, which could greatly affect the applicability of ...
Bo ZHANG +5 more
core +1 more source
Harnessing social media data to track species range shifts
Conservation Biology, EarlyView.Abstract Biodiversity monitoring programs and citizen science data remain heavily biased toward the Global North. Especially in megadiverse countries with limited biodiversity records, incorporating social media data can help address existing data gaps.
Shawan Chowdhury +15 more
wiley +1 more source
Dianci bileiqi, 2018 模型数值仿真是研究输电线路耐雷性能的有效手段,但是有必要比较不同仿真模型差异性以有效指导线路雷电防护。利用EMTP软件搭建110 kV和500 kV输电线路模型,计算线路发生雷击反击和绕击时,不同绝缘子串模型和杆塔接地模型下的线路耐雷水平,比较不同电压等级线路受模型差异影响大小,讨论安装避雷器时防护效果受差异模型影响。分析结果表明:不同绝缘子串闪络模型差异主要体现在闪络电压和闪络时间。绝缘子串闪络模型对线路反击耐雷水平计算影响要比绕击耐雷水平明显。线路电压等级越高 ...
罗永志, 王艳辉
doaj
Research on Behavior of Natural Circulation of Coolant in Primary Circuit System of Pool Type Fast Reactor [PDF]
Thermal-hydraulic phenomenon of coolant in the primary circuit of pool type fast reactor under accident decay heat removal conditions is complicated because the layout of direct heat exchanger.
CHENG Daoxi, ZHANG Xuefeng, DU Kaiwen, ZHAI Weiming, QI Xiaoguang, ZHOU Ping, YU Song, MA Xiaoyao, LI Ruizhi
core +1 more source
Perceived costs as drivers of wildlife management preferences in rural Tanzanian communities
Conservation Biology, EarlyView.Abstract Effectively managing human–wildlife interactions is crucial for fostering coexistence on shared landscapes. Management options are most effective when aligned with the preferences of people directly affected by wildlife, yet little is known about how socioecological factors influence these preferences.
Christian Kiffner +10 more
wiley +1 more source
Shuitu Baochi Xuebao, 2003 嘉陵江是上长江上游的重要支流,是长江三峡水库重要的洪水和泥沙来源地,也是“长治 “工程重点实施对象.通过对典型支流和干流沿程主要站降雨径流和降雨输沙模型的应用研 究,分析了水保措施的减水减沙效益.同时应用统计预测模型、BP网络模型、双累积曲线预测模型,对嘉陵江流域未来水沙变化趋势进行了预测.
张明波 +3 more
doaj +2 more sources
Shuitu Baochi Xuebao, 2001 根据一些常用的土壤持水经验模型(VG模型、BC模型和CP模型)推求用于估算非饱和导水率函数的表达式,并采用田间实测的导水率数据与模拟估值进行对比.结果表明这些估算模型适宜用来描述细质地以上土壤的非饱和导水特性,且VG模型的估值效果要好于其他模型.当满足使用条件时,间接估值法可获得较好的模拟估值精度.
许迪 Mermoud A
doaj
Structured machine learning modeling to support conservation of deep‐sea benthic biodiversity
Conservation Biology, EarlyView.Abstract Biodiversity monitoring programs need to deliver accurate, timely, and actionable predictions. To establish a predictive monitoring program for deep‐sea benthos of the Santos Basin, Brazil, we developed a two‐stage structured model that allowed comparison of biodiversity predictions obtained from environmental simulations (2M‐Sim).
Gustavo Fonseca +23 more
wiley +1 more source