Results 61 to 70 of about 4,156 (155)
Shuitu Baochi Xuebao, 2002 水土保持具有极其重要的社会属性,充分理解并应用水土保持的社会性,把水土保持作为一种政府行为,制定科学、系统和可操作的保障性法规制度,发挥社会主义制度的优越性,唤醒全民族生态环境保护意识,调动全社会力量参与水土保持生态环境建设的积极性,具有十分重大的意义.
张永江 王志意
doaj
Water Volume and Salinity Forecasts of the Small Aral Sea for the Years 2025 [PDF]
, 2014 The Aral Sea is a saline endorheic basin in Central Asia. From 1960 onwards the lake started to shrink because of the utilization of rivers water for irrigation purposes. Since the irrigation began, massive amounts water has been used.
Behzod Gaybullaev +2 more
core
Shuitu Baochi Xuebao[目的] 为探究流域尺度综合水土保持措施下土壤碳库的演变特征,评估流域水土保持碳汇潜力。[方法] 以黄土高原典型水土流失治理小流域滕子沟为研究对象,分析流域1977—2022年水土保持措施配置时空变化,明确不同水土保持措施配置下土壤有机碳(SOC)库演变规律,结合情景分析评估不同水土保持配置下流域土壤碳汇潜力。[结果] (1)与1977年相比,流域水土保持措施总面积增加32.9%,其中坝地、坡面林地、梯田草地和梯田林地面积分别增加0.5%,5.0%,11.1%,16.3 ...
贺国凯 +5 more
doaj
水土保持措施对土壤物理性状的影响——以黄土高原水土保持世界银行贷款项目区为例
Shuitu Baochi Xuebao, 2003 通过对黄土高原水土保持世行贷款项目实施后土壤物理性状变化的分析,了解不同水土保持 措施对土壤物理性状的影响.结果表明,水土保持措施的实施,使砂壤土的物理性粘粒逐渐 增加,物理性砂粒相应减少,土壤容重降低,孔隙度增大,改善了土壤结构;同时以延河项 目区人工种草为例,经计算消除降水影响后,所得水保措施对土壤含水量的影响量达2.35% .
魏义长 +7 more
doaj +2 more sources
Spatiotemporal Landslide Activity Derived from Tree-rings: The Tieliku Mingsui Landslide, Northern Taiwan [PDF]
, 2014 Spatiotemporal landslide activity records are reconstructed for the Tieliku Mingsui landslide. Periods and the extent of scar activity at the foot of the landslide body are estimated from satellite and aerial photo records.
Bor-Shiun Lin +4 more
core
Improvement of LiDAR Data Accuracy Using 12 Parameter Affine Transformation [PDF]
, 2014 LiDAR data in a local coordinate system may need to be georeferenced and converted into a geographic or projected system. In coordinate transformation, the 7-parameter Helmet transformation method is usually used in measurements to eliminate the ...
Cheng-Yang Hsiao +2 more
core
The Application of Borehole Hydrogeological Investigation for Assessing Landslide Susceptibility [PDF]
, 2014 On the basis of 49 borehole studies at the mid- and upper-stream of the Dajia and Jhuoshuei river basins, landslide occurrence was found to not only be related to subsurface geological composition and hydrogeological characteristics, but also to ...
Chi-Chao Huang +13 more
core
, 2014 土石流災害發生受到降雨的強度和空間變異性影響。因此，了解降雨的空間變異性特性是土石流減災的先決條件。在本研究中，針對不同降雨類型使用地理統計進行降雨空間變異特性分析，分別對夏季對流雨、颱風、梅雨和冬季鋒面雨進行分析，選取較適合的降雨空間變異特性。結果發現夏季對流雨的影響範圍最小 (約55 公里)，代表其空間變異大，而其他三種降雨類型影響範圍較大 (約69 公里) 則空間分布較均勻。因此，在研究中建議以夏季對流雨的空間變異特性，進行台北市雨量站網的評估。The intensity and spatial ...
Cheng-Chia Lien +15 more
core
Shuitu Baochi Xuebao, 2023 淤地坝是黄土高原地区重要的沟道治理措施,也是陆地生态系统中重要的储碳场所。评估淤地坝的碳汇作用与能力,可为研究其他水土保持措施碳汇提供重要借鉴,也为我国碳达峰、碳中和目标提供科学依据。以黄土高原淤地坝为研究对象,系统探讨淤地坝的碳汇效应与机理,提出淤地坝碳汇能力估算方法。结果表明:淤地坝具有保土保碳、减蚀减排和增绿增汇作用。在过去50年中黄土高原淤地坝保碳能力为2.16×107 t C,减排能力为4.33×106~8.66×106 t C,增汇能力为6.84×105 t C。淤地坝产生积极的碳汇效益 ...
李智广, 成辉, 方怒放, 曾奕
doaj
利用滲透試驗探討雙層土壤之滲流沖蝕行為及其數值模擬 [PDF]
, 2014 Seepage erosion occurs when finer particles are dragged out from other soil particles by water. This type of erosion causes progressive failure inward into the slopes and slope instabilities.
Ming-Lang Lin +3 more
core