Results 41 to 50 of about 334 (147)
Examination and evaluation of multi-source monthly scale fusion precipitation product in China based on machine learning algorithm [PDF]
, 2023 Grid format precipitation products have better spatial monitoring capabilities compared to ground meteorological station observations, but there are significant differences in performance among different products.
Xiaochen ZHU +3 more
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Multiple Knowledge-Enhanced Meteorological Social Briefing Generation [PDF]
Frequent meteorological disasters present new challenges for decision-making in disaster response. As a timely and effective source of intelligent information, social media plays a vital role in detecting and monitoring these situations.
Lu, H, Niu, Z, Peng, X, Shi, K, Zhu, Y
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极端暴雨下小流域洪峰对植被和梯田的响应——以山东临朐台风“利奇马”暴雨为例
Shuitu Baochi Xuebao, 2020 全球气候变化背景下，极端暴雨事件出现频率增加，研究小流域洪峰形成机理对暴雨洪水预测与防灾减灾具有重要意义。基于2019年9号台风"利奇马"在山东省潍坊市临朐县造成的特大暴雨事件，选取暴雨中心附近的17个小流域，综合应用野外调查、遥感解译等方法，研究了小流域洪峰强度和敏感性对植被和梯田的响应特征。结果表明：该暴雨事件中，小流域洪峰流量为2.36~56.50 m3/s，洪峰模数为8.00~48.89 m3/（s·km2），洪水指数介于3.61~4.55。在相似降雨条件下，洪峰模数 ...
刘元昊 +9 more
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Shuitu Baochi Xuebao, 2023 为探究极端暴雨下重力侵蚀分布规律及其环境条件,以2019年"利奇马"台风引发的特大暴雨事件为对象,采用无人机航拍、室内解译等方法,研究了位于暴雨中心的山东省临朐县曾家沟小流域内不同类型重力侵蚀的数量、空间分布特征及其影响因素。结果表明:(1)小流域内发生的重力侵蚀共70处,主要类型为滑坡(49处),其次为泥石流(14处)和崩塌(7处)。(2)重力侵蚀面积、侵蚀量分别与坡度变率、坡度、坡位、高程、坡向和坡向变率呈正相关,与距梯田距离、距道路距离和土地利用类型呈负相关。(3)坡度是影响重力侵蚀的最重要因素 ...
喻涵 +5 more
doaj
Characteristics of nitrogen and phosphorus losses with surface runoff in typical sub-watersheds of Jiulong River watershed. [PDF]
, 2004 选取九龙江流域5个典型汇水区,通过流域主要雨季天然降雨径流过程监测,对所获得的氮磷营养盐的监测数据进行归纳与分析,着重探讨了暴雨事件下径流氮磷流失及其形态的变化规律。结果表明:暴雨事件下农业汇水区地表径流氮输出以水溶态为主,磷以泥沙结合态为主,天然林地为主的汇水区则相反,前者以泥沙结合态为主,后者以水溶态为主;5个汇水区暴雨事件中总氮最高浓度值为日常采样浓度值的2.9～11.3倍,暴雨事件中总磷最高浓度值为日常采样浓度值的2.9～20.5倍;氮磷输出量均值的差异反映氮磷输出量大小受土壤质地、施肥量 ...
张珞平 +5 more
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Responses of Loess Ground with Different Slopes and Vegetation Covers to Rainfall Infiltration [PDF]
[Objective] To investigate the soil moisture response to rainfall in loess ground with different slopes and vegetation types. [Methods] Eight in-situ observation plots were established, including flat surfaces with bare soil, Artemisia cover, and Robinia
HU Xiangyang +6 more
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Zhejiang Daxue xuebao. Lixue ban, 2019 暴雨情景下，山区径流水位突涨、流速与流量骤变等易发生公路洪灾，对人民生命财产安全造成巨大威胁。以巫山县为例，在不同强度降雨阈值下对降雨-径流水文参数指标进行量化处理，全面分析了降雨与水位、流速、流量之间的关系，并在多情景降雨下，基于公路洪灾孕灾指标，构建了公路洪灾预警模型。研究结果表明：山区径流水位变化幅度大于流速，而在大暴雨及特大暴雨情景下（降雨临界值185 mm），流速变化大于水位，在不同降雨阈值下，等级较低的河流更易发生公路洪灾，其水位空间变化更剧烈、效应范围更广 ...
YANGMeng(杨猛) +5 more
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Study on the stability evaluation method of fuzzy mathematical landslide improved by entropy weight method [PDF]
Landslide are one of the most common types of geological disasters in China, posing a serious threat to the safety of people's lives and properties due to their propensity and frequency.
Chen XUE +5 more
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, 2018 随着中国经济的快速发展,越来越多的水环境问题开始涌现。海绵城市的提出正是立足于当下中国城市内涝及相关环境问题。基于此,本文简要分析了中国城市内涝的原因及海绵城市相关构建思路,重点阐述了美国可持续雨水管理经验与守护水资源上的实际做法,并给出了美国雨水管理实例,以期为中国海绵城市建设提供参考。国家留学基金委公派访学项目(No.201506315023;No ...
卢豪良, 王思齐, 黄金良
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Study on the influence of ECMWF short-term forecast field assimilation on regional mesoscale model forecast [PDF]
The forecast of the global numerical weather prediction model is often used as the background field to drive the regional mesoscale weather models, and its forecast quality has an important impact on the prediction skill of regional models. The mesoscale
Anwei LAI +8 more
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