Results 61 to 70 of about 1,909 (163)
Shuitu Baochi Xuebao, 2019 为探究雨强和植被覆盖度对花岗岩红壤坡面产流产沙的影响，通过室内人工模拟降雨试验，分析了不同雨强（0.5，1.0，1.5 mm/min）和植被覆盖度（0，20%，40%，60%）下坡面侵蚀的产流、产沙规律及相关关系。结果表明：（1）同一雨强下，初始产流时间随植被覆盖度增加而延迟，并随雨强增大而提前，雨强越大，产流时间提前越明显）（2）各坡面径流率、侵蚀率随植被覆盖度增加而减小，且植被覆盖度越高，径流率和侵蚀率波动范围越小，侵蚀过程越稳定）（3）有植被覆盖的坡面，产沙主要以0.25 ...
常松涛 +7 more
doaj
Effectiveness of protected areas in the Caucasus Mountains in preventing rangeland degradation
Conservation Biology, Volume 39, Issue 3, June 2025.Abstract As land use intensifies globally, it increasingly exerts pressure on protected areas. Despite open, nonforested landscapes comprising up to 40% of protected areas globally, assessments have predominately focused on forests, overlooking the major pressures on rangelands from livestock overgrazing and land conversion.
Arash Ghoddousi +12 more
wiley +1 more source
Ecological effect of urban spatial expansion in river valleys: A case study in the main urban area of Lanzhou City [PDF]
, 2023 [Objective] The ecological effect of urban spatial expansion is the key problem of human-environment relationship in the process of urbanization. It is of great significance to explore the complex scientific problem of ecological effect caused by urban ...
WANG Ziyang, SHI Peiji, SHI Jing, ZHANG Xuebin, LIU Yue
core +1 more source
Threats posed by land use to water quality in South Africa's strategic water source areas
World Water Policy, Volume 11, Issue 1, Page 155-164, February 2025.Abstract Understanding the negative impacts of land use/land cover (LULC) on water quality is key to developing effective integrated catchment management strategies. However, in line with the Integrated Water Resources Management (IWRM) philosophy, this necessitates the generation and application of useful scientific knowledge, which stakeholders and ...
Kent Anson Locke, Kevin Winter
wiley +1 more source
Shuitu Baochi Xuebao, 2021 为深入探索不同植被盖度及其格局在不同冲刷流量下的坡面侵蚀过程机理，利用野外人工冲刷试验，以自然恢复草本植被小盖度格局、坡上相对聚集格局、坡中相对聚集格局、坡下相对聚集格局和较大盖度格局为研究对象，通过引入水流路径长度和水流阻抗指数，分析了不同植被盖度及格局对坡面侵蚀和水文连通性的影响作用。结果表明：（1）植被盖度及格局可影响坡面的侵蚀状况。坡面植被盖度为13.5%的产流产沙量分别是盖度为34.0%坡面对应值的2.36，3.02倍；同时与坡上和坡中相对聚集格局相比，坡下相对聚集格局的坡面产流产沙量最多 ...
闫帅旗 +4 more
doaj
Integrating adult occurrence and reproduction data to identify conservation measures for amphibians
Conservation Biology, Volume 39, Issue 1, February 2025.Abstract Monitoring programs are pivotal to establishing sound management. Due to economic, logistic, and time limitations, monitoring programs often overlook differences among life‐history stages. However, species occurrence does not necessarily mean population viability, and it is unclear to what extent monitoring programs that do not consider ...
Elia Lo Parrino +4 more
wiley +1 more source
Shuitu Baochi Xuebao, 2021 为探究黄土残塬沟壑区退耕还林（草）工程等林业生态工程实施后林业资源恢复情况，以黄土高原DEM数据及2000—2020年归一化植被指数NDVI数据为基础，采用地形因子计算、水文分析、空间叠加分析等方法，划分了较为完整的黄土残塬沟壑区的范围，并利用趋势分析法、变异系数的相关理论与方法，分析了近21年来黄土残塬沟壑区NDVI时空变化特征。结果表明：（1）黄土残塬沟壑区横跨山西、陕西和甘肃3省，面积约为2.99万km2，沟壑密度为1.91~3.21 km/km2；（2）黄土残塬沟壑区NDVI从时序变化上看 ...
刘泽晖, 毕华兴, 侯贵荣
doaj
Hazard assessment of landslides in Lancang County, Yunnan Province based on weighted information value model [PDF]
Lancang County is located in the longitudinal tectonic zone of western Yunnan, where landslides are frequently developed by strong tectonic movement and increasing human activities, thus posing a significant threat to the safety and security of the local
Lanting WANG +3 more
core +1 more source
Integrative Conservation, Volume 3, Issue 4, Page 312-329, December 2024.Biosphere reserves aim to protect global biodiversity alongside social and economic development. In the Cape Floristic Region, biosphere reserves are an effective conservation approach to protect arthropods against habitat transformation in this biodiverse region.
Michael J. Samways +3 more
wiley +1 more source
人工降雨条件下植被覆盖对黄土坡面养分随径流泥沙迁移影响的试验研究
Shuitu Baochi Xuebao, 2021 植被覆盖可有效保护地表，抑制产流产沙过程，进而影响坡面养分迁移过程。选取黄土高原典型白羊草和铁杆蒿草地，通过人工模拟降雨试验（雨强60 mm/h，历时60 min，坡度15°），研究植被不同盖度下（10%，20%，30%，45%，60%，80%）坡面径流、泥沙养分特征。结果表明：（1）土壤有机质、全氮和全磷含量均随植被盖度增加呈线性增加（R2≥0.63），相对于铁杆蒿样地，白羊草样地土壤有机质和全磷含量分别增加28.8%~107.1%和10.6%~25.0%，全氮含量减少2.6%~42.5%。（2 ...
李家明, 汪建芳, 杨艳芬, 王兵
doaj