Results 61 to 70 of about 17,157 (203)
Analysis on linkage between farm landscape and water quality in Jiulong River watershed [PDF]
, 2011 基于lAndSAT遥感影像进行九龙江流域不同坡度类型的农业用地景观与水质指标(COdMn、nH4+-n、TP)的相关性分析,并分别对丰水期、枯水期、平水期的农业用地类型百分比与各水质指标进行线性回归。结果显示,坡度小于15°和大于25°的农业用地占总农业用地的面积比例与各水质指标呈较强的正相关。景观聚集度指数(COnTAg)与水体中TP浓度呈显著正相关,决定系数为0.565;香农多样性指数(SHdI)与水体中TP浓度呈显著负相关,相关系数为-0.527。丰水期和枯水期是九龙江流域水质变化较大的时期 ...
冯媛 +5 more
core
工程技术与管理, 2019 水利工程的建设有利于中国发电、灌溉和防洪等工作的实施，为加快现代化进程奠定了基础。其中，小型农田水利工程是最为关键的组成部分之一，对于农业发展具有重大意义。在新时期社会的发展当中，对于小型农田水利工程管理也提出了更高的要求，应该转变传统管理理念与方法，促进工程建设质量与效率的提升，提升农业经济发展水平。然而，当前管理工作中也会存在诸多问题，限制了工程建设的步伐。本文将通过分析小型农田水利工程管理的问题与原因 ...
璐璐 李
semanticscholar +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Efficient and durable bifunctional electrocatalysts are vital for scalable water electrolysis. Here, we realize cobalt‐vacancy (Covac) engineering in CoFeP supported on N,P‐codoped carbon nanocages (Co1‐vacFeP/NPC) through a simple route comprising a CoFe Prussian blue analog precursor, phosphidation–pyrolysis, tannic‐acid etching, and a ...
Yuan‐Liang Yuan +6 more
wiley +1 more source
高寒区多源降水产品精度与水文模拟效果评估——以雅鲁藏布江流域和拉萨河流域为例
Shuitu Baochi Xuebao, 2023 卫星降水产品在缺资料地区开展水文气象研究及径流模拟中发挥着至关重要的作用,然而卫星降水产品的精度可能会影响径流模拟效果。采用多种统计指标和VIC水文模型综合评估5种卫星降水产品(CMORPH-BLD、GSMaP_Gauge、CMFD、MSWEP和PERSIANN-CDR)在雅鲁藏布江流域的精度和拉萨河流域的水文模拟效果。结果表明:(1) CMORPH_BLD和GSMaP_Gauge在少雨季存在低估,CMFD在少雨季与观测值具有很好的一致性。MSWEP和PERSIANN-CDR在多雨季和少雨季存在高估 ...
班春广 +5 more
doaj
Pattern to Process in Land Use and Cover Change and Its Water Quality Response across Multiple Scales in the Jiulong River Basin [PDF]
, 2011 河流水质受到自然与人为因素的综合作用，而土地利用/覆被变化（LUCC）是人类活动作用于自然资源与环境的一种最为显著的表现形式。了解LUCC的模式、过程及其水质效应将有助于从人为扰动、非点源污染等角度认识流域水体退化的发生过程和影响机制，进而有利于流域水质的预测、控制与管理。在人口增长与经济发展的压力下，我国水环境问题日渐凸显，研究流域LUCC过程及其水质效应在我国具有现势性和紧迫性。本研究选取土地利用/覆被变化较为剧烈的亚热带中尺度流域—九龙江流域为代表性流域，探讨九龙江流域土地利用 ...
李青生
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT As a core component in the electrochemical water splitting system, the cathode catalyst is capable of boosting the kinetics of the hydrogen evolution reaction (HER), while the scarcity and expenditure of current noble metal‐based electrocatalysts seriously restrict the large‐scale commercial development of hydrogen manufacturing devices. Here,
Haiyan He +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Against the backdrop of global clean energy transition and surging demand for lithium resources, lithium extraction from salt lakes presents unprecedented development opportunities. Nanofiltration (NF) membrane technology, recognized for its efficiency, energy savings, and environmental benefits, demonstrates significant application potential ...
Wen‐Feng Li +5 more
wiley +1 more source
Jingshui jishu【目的】污水处理厂减污降碳协同控制是水务系统双碳转型的必然要求。为基于“双碳”目标的污水处理厂建设与技术改造项目的技术比选提供决策支持，本文开展了以减污降碳协同控制为目标的技术评估方法研究。【方法】本文基于GPS-X软件构建污水处理厂不同工艺模型，并应用实际运行数据对模型进行率定；采用协同控制坐标系-交叉弹性值(E a/G )法、层次分析法(AHP)-等权重法构建了定性与定量相结合的协同控制技术综合评估方法及模型，评估了6项协同控制措施的协同控制效果。【结果】精确曝气技术 ...
Liu Xuejie +5 more
doaj +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT With the rapid growth demand for advanced integrated electronic systems, lightweight flexible electromagnetic interference (EMI) shielding films integrated with functional properties, such as excellent mechanical properties and self‐healing capability, are a research focus in high‐tech functional materials. Herein, a sandwich‐structured aramid
Dan Guo +9 more
wiley +1 more source
Progress in developments and applications of the HYDRUS model and associated coupling model packages [PDF]
HYDRUS model is widely used in agricultural irrigation and pollution transport because it can comprehensively consider the movement of water, heat, and pollutants in the soil-plant-atmosphere system.
Bei ZHANG +5 more
core +1 more source