Results 1 to 10 of about 4,372 (132)
, 2017 黄土高原中部的丘陵沟壑区位于半湿润、半干旱气候带，生态环境脆弱，水土流失严重，植被恢复是该地区水土保持与生 态重建的重要措施。辽东栎天然次生林和刺槐人工林是该地区典型的森林植被类型。以黄土丘陵森林分布区边缘的两种主要 森林类型为对象，通过采集林地不同深度土壤样品，对比分析两种林地土壤中碳、氮、磷含量的计量关系及垂直分布特征，旨在 探明该区域土壤化学计量特征及主要影响因素。结果表明: ( 1) 在两种林地类型中，土壤有机碳与全碳含量呈正相关关系，两 种林地可用同一曲线进行拟合 ...
关晋宏 +5 more
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Shuitu Baochi Xuebao, 2005 采用小样方人工模拟降雨,对九寨沟不同植被下不同坡度地表径流量进行了模拟。结果表明:在同一降雨事件下,地表草本盖度、苔藓盖度、凋落物盖度对地表径流量影响程度较大,而土壤初始含水量和腐殖质厚度的影响不大;同一坡度上不同林地类型的地表径流量无明显规律;相同林地类型上,辽东栎林下地表径流量随坡度增加而增大,冷杉林和云杉、辽东栎混交林下地表径流随坡度变化规律不明显。
王晶 包维楷 丁德蓉
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Identification of Key Ecological Restoration Areas and Optimal Allocation of Vegetation for Water Conservation in Hanjiang River Basin [PDF]
, 2023 [Objective] The key ecological restoration areas for water conservation in the Hanjiang River basin were identified, and the allocation of vegetation was optimized, and to verify the effects of ecological restoration was verified in order to provide a ...
Bai Shuying, Wu Mengke, Yu Yeting
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Erosion Characteristics and Its Simulation of Erosion Amount for an Artificial Forest in an Exposed Feldspathic Sandstone Area [PDF]
, 2022 [Objective] The rainfall characteristics and water and sediment control ability of different types of artificial forestland in an exposed feldspathic sandstone area were determined in order to provide guidance for vegetation construction in the study ...
Dong Xiaoyu, Qin Fucang, Yang Zhenqi
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Water Conservation Function of Artificial Forests in Kubuqi Desert [PDF]
, 2023 [Objective] Research was conducted on understory litter and soil hydrological function for artificial forests in the forest protection station in the eastern section of the Kubuqi Desert.
Chen Hongwei +7 more
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Effects of Land Use Change on Spatio-temporal Evolution of Ecosystem Service Value Profit and Loss in Irtysh River Basin [PDF]
, 2022 [Objective] The correlation between land use changes and ecosystem service values were assessed to provide references for formulating appropriate land intervention policies. [Methods] The five-period land use data of the Irtysh River basin and the CLUE-S
Dai Lizheng +6 more
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基于随机森林模型提取干旱区人工绿洲耕地 -以阿拉尔绿洲区为例
生态环境与保护, 2020 本文以干旱区阿拉尔2013年-2018年的Landsat8为主要数据来源,基于随机森林模型对干旱区绿洲植被信息进行提取。结果表明：总体分类精度为87%,满足干旱区绿洲提取要求。随机森林模型可以很好地提取干旱区绿洲植被,为干旱区提取绿洲植被提供了依据。
静 王
semanticscholar +1 more source
Remote Sensing Classification System of Land Use and Land Cover for Global Coastal Zone Considering Fine Classification of Wetlands [PDF]
, 2018 Land use and land cover (LULC) classification is the important foundation for research on global changes, while establishing a scientific LULC classification system is the fundamental question for research on LULC changes, which is in need of being ...
侯婉, 侯西勇
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Shuitu Baochi Xuebao, 2007 对紫色土丘陵区4种典型土地利用类型的土壤抗蚀性进行了研究,结果表明:(1)通过主成分分析,＞0.25 mm和＞0.5 mm水稳性团聚体含量、结构体破坏率能较好地衡量紫色土不同土地利用类型的土壤抗蚀性能;(2)＞0.25 mm和＞0.5 mm水稳性团聚体含量均为竹林地＞园地＞传统农耕地＞农林混作型耕地,结构体破坏率则表现为竹林地＜园地＜传统农耕地＜农林混作型耕地;(3)不同土地利用类型水稳性指数差别明显,其中竹林地为0.868,其次是园地、农林混作型耕地,分别为0.704,0.627,传统农耕地为0 ...
史晓梅, 史东梅, 文卓立
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Shuitu Baochi Xuebao, 2021 选择晋西黄土区蔡家川流域5种典型林地（山杨×辽东栎天然次生林、人工油松×刺槐混交林、人工油松林、人工刺槐林、人工侧柏林）作为研究对象，在每块样地中心布设1个土壤水分观测点，采用TRIME-TDR土壤水分测定仪定位观测2016—2018年1—12月的土壤体积含水量，测定深度为200 cm，每20 cm为1个测层，每月分上、中、下旬进行土壤水分含量观测，分析不同林地类型土壤水分年内变化规律和土壤水分垂直变化规律。结果表明：（1）研究区不同林地土壤水分年内变化可以划分为稳定期（1—3月）、波动期（4—6月 ...
赵丹阳 +7 more
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