Results 31 to 40 of about 1,909 (163)
Shuitu Baochi Xuebao, 2022 为了解退耕还林草工程实施20年来黄土高原生态脆弱区生态环境的变化及其主要驱动力,选取榆林市作为黄土高原生态环境脆弱区的代表,基于像元二分模型估算榆林市2001-2020年的植被覆盖度,利用一元线性回归法分析其20年来植被覆盖度的时空变化特征,并结合偏相关分析和地理探测器法筛选退耕还林草不同时期影响榆林市植被覆盖度年际变化和空间分异的主导因素。结果表明:(1)2001-2020年榆林市植被覆盖度随时间序列呈显著增加趋势(S=0.011 ...
刘逸滨 +4 more
doaj
GIS-based Study of Ecological Water Requirement of Vegetation in Inner Mongolia Autonomous Region [PDF]
, 2023 [Objective] The ecological water requirement (EWR) of vegetation in different typical zones for the rational allocation of water resources in the Inner Mongolia Autonomous Region was analyzed and calculated to provide scientific suggestions for water ...
Ge Zheng +5 more
core +1 more source
Effects of Human Activities on Terrestrial Vegetation Coverage Change of Poyang Lake Basin During 2000—2020 [PDF]
, 2022 [Objective] The mechanism on how human activities affect vegetation dynamics was studied in order to promote the healthy development of terrestrial ecosystems.
Liu Jia +4 more
core +1 more source
Shuitu Baochi Xuebao, 2022 为深入研究坡度与植被对坡面流水力学特性的影响,以Navier—Stokes方程为基础,建立了非淹没刚性植被坡面流模型,并对该模型进行验证。运用该模型,参考西南山区实际情况,设置6个坡度、6个单宽流量和6种覆盖度组合条件下共216种工况,研究了坡面流的水力学特性。结果表明:流速与坡度、流量及植被覆盖度之间呈指数变化,相关系数为0.987。相同流量下,随着坡度的增加,流速增速逐渐减小,植被对坡面流的减缓作用逐渐减弱。阻力系数受到坡度、流量和植被覆盖的影响,存在临界覆盖度,低于临界覆盖度时 ...
胡静 +4 more
doaj
Evolution and Spatial-temporal Shift Characteristics of Soil Erosion in Yan'An City During 1990—2020 [PDF]
, 2022 [Objective] The temporal and spatial changes in soil erosion intensity when farmland is returned to forest or grassland in Yan'an City Shaanxi Province were analyzed in order to provide a reference for researches on the planning and evaluation of soil ...
Han Xiaoyu +3 more
core +1 more source
Shuitu Baochi Xuebao, 2022 为深入探讨坡面植被分布对产流产沙过程的影响，定量分析植被分布与坡面产流产沙的关系，通过人工降雨试验，在15°坡面条件下，对不同植被覆盖度（40%，60%）、不同降雨强度（30，60，90 mm/h）和不同植被分布位置（相对距离为0，0.2，0.4，0.6，0.8，1.0）条件下的坡面产流产沙进行观测，分析不同植被分布条件下的水土保持作用，提出了不同覆盖度下控制水土流失的植被优化配置。结果表明：（1）在一定坡度和降雨强度条件下，不同植被分布条件下坡面产流率和产沙率均表现为先迅速增加后趋于稳定的变化趋势 ...
孙若修 +4 more
doaj
Soil Erosion and Its Spatial Distribution Characteristics in Three-River-Source National Park [PDF]
, 2023 [Objective] The Three-River-Source National Park (TRSNP) is considered to be the “water tower of China”, and is an important ecological security barrier in China.
Huang Tingting +5 more
core +1 more source
Spatiotemporal Evolution and Coupling Coordination of Socio-economic Level and Ecological Resilience in Fuzhou Metropolitan Area [PDF]
, 2023 [Objective] The coordinated state of socio-economic level (SEL) and ecological resilience (ER) in the Fuzhou metropolitan area (FMA) and its development trend were analyzed in order to provide regulatory suggestions and theoretical references for high ...
Chen Qiuxia +6 more
core +1 more source
Shuitu Baochi Xuebao, 2023 为定量研究植被覆盖与土壤保持两者之间的关系及植被覆盖对土壤保持的影响,选取十大孔兑为研究区,利用趋势分析法、空间自相关分析、InVEST模型,重点分析十大孔兑2000-2020年植被覆盖、土壤保持时空变化及植被覆盖变化对土壤保持的作用。结果表明:(1)研究期内,十大孔兑区植被覆盖均呈增加趋势;(2)2000-2020年,土壤保持量随着植被覆盖的增加而增加,说明植被覆盖增加对于土壤侵蚀有明显的抑制作用,对土壤保持服务功能有明显的促进作用;(3)植被覆盖与土壤保持局部空间自相关,Moran's ...
曾令建 +4 more
doaj
Construction of Ecological Security Pattern and Identification of Key Regions Based on Ecological Assessment and Circuit Theory [PDF]
, 2023 [Objective] The ecological security pattern of Anhui Province was constructed and the key areas of ecological restoration were identified in order to build an ecological basis for urban development, and to provide a scientific basis for the territorial ...
Chu Zhaojun +4 more
core +1 more source