Results 21 to 30 of about 136,659 (143)
Shuitu Baochi Xuebao, 2023 为分析黄土高原不同类型侵蚀沟形态特征及其区域差异,以黄土高原第一副区和第五副区小流域为例,基于无人机影像(0.15 m)及DEM(1 m),分析沟谷网络特征和各类型侵蚀沟的数量特征,并对比冲沟和切沟的二维、三维形态参数。结果表明:丘一区小流域主沟支沟比为1∶35.6,远小于丘五区小流域主沟支沟比(1∶22.0),且各级沟谷密度多高于丘五区,表明丘一区支沟数量多,发育程度较高,地表更破碎,沟谷系统形态更复杂。丘一区和丘五区侵蚀沟类型都以切沟为主,密度分别为9.72,14.22 km/km2 ...
张楠 +4 more
doaj
Shuitu Baochi Xuebao, 2003 切沟侵蚀是一种常见的土壤侵蚀现象,切沟侵蚀定量研究可以进一步揭示切沟侵蚀规 律,为建立切沟侵蚀预报模型、切沟侵蚀危害的评估与治理提供科学的依据.介绍了近 年来有关切沟侵蚀定量研究的主要进展,对目前主要方法的适用范围、优点及局限性进行了讨论,并指出切沟侵蚀定量研究中亟待解决的问题和研究方向.
程宏, 伍永秋
doaj +2 more sources
Defining and identifying relevant stakeholders to advance effective conservation
Conservation Biology, Volume 40, Issue 3, June 2026.The challenge of defining stakeholders in environmental science and an approach for refining existing definitions. Abstract Stakeholder is a contested term that has spawned a multitude of ad hoc definitions. The ambiguity of these definitions has oftentimes impeded transdisciplinary research in environmental governance and conservation science because ...
Milan Büscher +5 more
wiley +1 more source
甘肃省小陇山林区降雨型浅层滑坡汇水面积-坡度关系及其影响因素
Shuitu Baochi Xuebao, 2023 沟头发生侵蚀的地形临界模型可有效预测侵蚀沟的形成条件,浅层滑坡失稳形成的洼地也是沟头形成的方式之一。为探究浅层滑坡临界起动模型的特点,以甘肃省天水市小陇山林区的降雨型浅层滑坡为研究对象,运用汇水面积-坡度关系,构建临界起动模型,与黄土高原典型侵蚀沟(浅沟、切沟)的临界起动模型进行对比分析,并探讨土地利用类型、植被类型和土壤质地对该模型的影响。结果表明:(1)浅层滑坡临界起动模型为S=3.50As-0.34,其侵蚀阈值为3.50,大于黄土高原典型浅沟(0.96)和切沟(1.54)的侵蚀阈值 ...
张晓曼 +4 more
doaj
World Medical &Health Policy, Volume 18, Issue 1, March 2026.ABSTRACT This systematic review examines the digital health interventions for inclusive and equitable solutions for transforming healthcare access and delivery in Nepal. The research focuses on improving digital health accessibility among marginalized and rural populations of Nepal.
Manoj Kumar Dahal, Gary L. Kreps
wiley +1 more source
World Water Policy, Volume 12, Issue 1, February 2026.ABSTRACT Water security in tropical regions faces escalating pressures from climate change, land‐use shifts, and population growth. We conducted a bibliometric review of 1146 peer‐reviewed articles (1964–2023) on tropical water security. Latent Dirichlet Allocation identified 13 thematic topics and their evolution. Publications rose sharply after 2012,
Karling Fernanda Schuster +3 more
wiley +1 more source
Integrative Conservation, Volume 4, Issue 3, Page 272-276, September 2025.This photo displays one of our camera locations within the core area of Mt. Siguniang National Nature Reserve, China. The site features steep scree slopes and > 1000 meters elevational gradient with minimal anthropogenic disturbance. Camera traps captured three unique snow leopard individuals (Mr.
Dongrui Wang +6 more
wiley +1 more source
Infant Mental Health Journal: Infancy and Early Childhood, Volume 45, Issue 4, Page 369-381, July 2024.Abstract The birth of a child has been associated with a decline in couple satisfaction, which has implications for the child's social‐emotional development. This study investigated the potential spillover effect on pregnant women's perceptions of their relationships with their partners of the Supporting the Transition to and Engagement in Parenthood ...
Nicolas Berthelot +5 more
wiley +1 more source
, 2016 为掌握切沟对土壤水分时空变异的影响，选取水蚀风蚀交错区两个典型切沟样点为研究对象。采用时间序 列分析和经典统计学方法，从土壤水分时间变化特征和空间分布格局两方面探讨。结果表明: 距沟道不同距离下 土壤储水量差异明显。300 cm 处样点可作为测定尺度下土壤储水量平均值。土壤水分在垂直方向上的变异受植被 特征影响，沟道影响较小。坡面土壤储水量的空间分布呈现不同的分布格局。坡顶风速大，土壤水分蒸发快，坡 中处土壤储水量最高，为949.
贾小旭 +3 more
core +3 more sources
Shuitu Baochi Xuebao, 2020 黄土洞穴与滑坡、沟蚀等侵蚀过程联系紧密并加剧了黄土高原的水土流失程度，但目前黄土洞穴发育的分布特征与侵蚀临界暂未明晰。利用无人机获得了研究区高分辨率影像与数字表面模型，基于影像标识了黄土洞穴并统计了其土地利用类型与洞穴直径，利用标识点在数字表面模型上提取了黄土洞穴的坡度、坡向、曲率和汇水面积等地形数据并分析了黄土洞穴的分布特征。结果表明 ...
郑炜珊 +3 more
doaj