Results 21 to 30 of about 10,247 (162)
Contribution of Different Processes in Wetland Soil N_2O Production in Different Restoration Phases of the Yellow River Estuary, China [PDF]
, 2014 采用时空替代法,选择黄河口生态恢复前后未恢复区(R_0)、2007年恢复区(R_(2007))和2002年恢复区(R_(2002))的芦苇湿地为研究对象,分析了生态恢复工程对湿地土壤N_2O产生不同过程与贡献的影响. 结果表明,尽管不同恢复阶段湿地土壤N_2O总产生量差异明显,但总体均表现为N_2O释放. 恢复区湿地土壤的N_2O产生量大于未恢复区.
孙万龙 +4 more
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Integrative Conservation, Volume 5, Issue 1, Page 137-149, March 2026.Pometia pinnata demonstrated life‐stage‐specific genetic responses to landscape features, with asymmetric gene flow patterns and population recovery following historical bottlenecks, revealing complex topographic and demographic influences on forest genetic structure.
Madhuparna Chatterjee +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2008 通过具有壤中流观测功能的径流小区的定位观测,结合人工降雨模拟试验,对常规施肥条件下紫色土坡耕地径流特征、过程及影响因素进行长期监测。结果表明:(1)紫色土坡耕地地表径流过程呈多峰特征,受瞬时雨强的影响明显;而壤中流过程则表现出明显的单峰、产流时间滞后、持续时间长等特点;(2)玉米灌浆成熟-收割期径流量明显高于其它生育期,地表径流、壤中流径流量分别为(65.06±5.94)mm,(86.36±3.27)mm,分别占3年地表径流、壤中流年均径流量的67.92%,79.82%;(3 ...
WANG, ZHU, LUO, ZHANG
doaj
Spatial and temporal variations of river water and sea-ice melted water in the western Arctic Ocean [PDF]
, 2015 北冰洋淡水组分的结构及其时空变化不仅显著影响北冰洋的生态系，而且对全球深海热盐环流和全球气候变化起着重要作用。本研究以白令海峡、楚科奇海陆架区和加拿大海盆等3个区域为研究对象，利用中国第1、2、3、4、5次北极科学考察在西北冰洋获得的海水δ18O数据，结合美国国家航空航天局发布的北冰洋δ18O数据，借助海水δ18O和盐度的质量平衡，定量研究淡水组分中河水和海冰融化水的贡献，揭示不同来源淡水组分在白令海峡、楚科奇海域及加拿大海盆的分布特征 ...
潘红
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Effects of Breccias and Round Gravels on Steep Cut Slope Runoff and Sediment Yield Under Simulated Rainfall [PDF]
, 2023 [Objective] The effects of breccias and round gravels on steep cut slope infiltration, runoff, sediment yield, and hydrodynamic characteristics were analyzed in order to provide a theoretical basis for a soil erosion prediction model and soil ...
Cao Longxi +5 more
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Emerging Risks and Housing Affordability Policy in Miami High‐Rises
Journal of Critical Infrastructure Policy, Volume 7, Issue 2, Fall/Winter 2026.ABSTRACT Recent advances in satellite‐based remote sensing and building performance measurement have raised critical questions regarding the long‐term settlement behavior of high‐rise structures situated on the complex subsurface of southeastern Florida.
Jean‐Pierre Bardet, Jeffrey Dorfman
wiley +1 more source
Method Development of Trace Urea in Seawater and Its Application in Different Environmental Samples [PDF]
, 2015 尿素，作为最主要的小分子溶解态有机氮，主要来源于浮游生物的代谢和有机物的再矿化。尿素可以直接被浮游植物和细菌等循环利用，作为主要氮源之一，在海洋真光层中对再生生产力的贡献不容忽视，因此尿素在全球海洋碳、氮生物地球化学循环过程中扮演着重要的角色。目前海水中尿素的测定方法主要是丁二酮肟分光光度法，已报道的分析方法在检测限和重现性方面都无法满足尿素研究痕量、准确和快速的测定需求。 针对现有不足，本论文通过探索海水样品中尿素显色反应的动力学过程，优化试剂比例，得到稳定的显色产物，有效地克服以往方法重现性差的问题，
陈莉
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Aqueous zinc‐ion batteries (AZIBs) hold great promise for safe and sustainable energy storage, but their commercialization is impeded by severe Zn dendrite growth and interfacial instability. To address these challenges, we propose a defect engineering strategy employing ultrafine ZnAl2O4 (ZAO) nanoparticles (∼5 nm) with oxygen vacancy defects
Yilun Ren +9 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 以太湖流域典型蔬菜地为研究对象,采用田间径流池法进行田间小区试验,研究不同施肥模式下蔬菜地地表径流氮磷流失特征。结果表明:地表径流总氮流失量为45.76～60.45 kg/hm2,总磷流失量为2.67～3.95 kg/hm2。与常规施肥相比,优化施肥可使地表径流氮磷流失量分别减少2.48,0.31 kg/hm2;而增氮施肥和增磷施肥处理的地表径流总氮流失量分别增加了7.76%,3.83%,总磷流失量增加2.84%,9.55%。总氮、总磷流失量与径流量呈显著线性相关,且总磷流失量与径流量的相关性更强(R2=
王春梅, 蒋治国, 赵言文
doaj
Riverine Nitrate Export Response to Hydro-climatic Variability in a Southeast China Coastal Watershed Based on Long-term Historical Data [PDF]
, 2015 气候变化对不同的自然地理区域的淡水系统，尤其是人口集中、对水资源高度依赖的近海流域的潜在影响的研究对于制定合理的水资源管理策略至关重要。本篇论文选取中尺度近海流域—九龙江流域，基于1961-2013年近53年的水文-气候与硝酸盐水质数据，评估气候变化对流域水量和水质及通量的影响。研究结果表明，在过去的50年里，九龙江北溪和西溪年径流量没有明显变化趋势，但随年降雨变化，呈自然波动。本研究开发的L-R图解法显示土地变化加强了气候变化对径流动态的影响。上世纪60年代至90年代之间，硝酸盐的浓度增加了30倍 ...
AYU ERVINIA
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