Results 71 to 80 of about 239 (108)
Shuitu Baochi Xuebao, 2023 针对喀斯特地区景观格局驱动水源涵养功能演变机制的相关研究较少,而水源涵养功能是岩溶石漠化治理等生态修复工程生态效益的关键指标之一,具有重要的研究意义。以地处西南喀斯特中心的野纪河流域为研究对象,基于InVEST模型、偏最小二乘模型(PLSR)、景观生态学理论等,探究野纪河流域2005—2020年水源涵养功能的时空分异特征及其与景观格局的耦合关系。结果表明:(1)野纪河流域景观类型以旱地、草地和灌木林等为主,各类型之间相互转化较为频繁,总体特征表现为旱地、灌木林和草地之间的转化以及建设用地对其余地类的挤占。
王耀鑫 +4 more
doaj
The Spatio-temporal Evolution of NDVI in the Three Gorges Reservoir Area Driven by the Synergistic Effect of two Factors over the Past 21 Years [PDF]
[Objective] To clarify the spatio-temporal characteristics of vegetation evolution in the Three Gorges Reservoir Area, and to quantitatively analyze the relationships between vegetation and key determinants, including climate, terrain, and human ...
LI Cheng +5 more
core +1 more source
Study on the characteristics and mechanism of antibiotic pollution in different aquifers [PDF]
The risk posed by antibiotics in various aquifers has attracted wide attention. This study investigated the pollution characteristics and controlling factors of antibiotics in different types of aquifers, and identified the indicator factors of ...
Fei LIU, Jialin WANG, Jinwei PAN
core +1 more source
Effects of Different Logging Residue Treatments on Acid Hydrolyzed Soil Organic Carbon Fractions and Soil Microbial Communities in a Chinese Fir Plantation [PDF]
[Objective] Acid hydrolyzed soil organic carbon fractions are important in soil, and the changes of their contents will affect soil microbial community composition.
GUO Jianfen +5 more
core +1 more source
Soil Preferential Flow Characteristics in Coal Mine Subsidence Area under Different Rainfall Duration [PDF]
[Objective] Research on the preferential flow characteristics triggered by cracks in coal mining subsidence areas can provide support for scientific and rational development of water resource management and ecological management practice in the mining ...
DAI Bin +4 more
core +1 more source
Shuitu Baochi Xuebao, 2017 应用第一次全国水利普查水土保持专项数据，分析了喀斯特地区实际土地利用单元地块空间统计特征及相应侵蚀规律。结果表明：喀斯特地区土地利用类型以林地、耕地为主，共占调查总面积的86.2%。由于地形破碎，地势陡峭，土地表现出破碎化特征，地块面积、坡长、坡度均值分别为3.45 hm2，45.3 m，21.7°。坡度对土壤侵蚀的影响大于坡长，陡坡耕作是耕地土壤侵蚀严重的主要原因，有68.6%的耕地位于陡坡，其侵蚀量要占总侵蚀量的65.6%。贵州省土壤侵蚀程度由西向东递减，以黔西南地区侵蚀最为严重 ...
陈美淇, 魏, 张科利, 陈月红
doaj
Shuitu Baochi Xuebao, 2022 基于西南喀斯特坡地近地表岩溶管道的调查统计,建立喀斯特区地表-地下二元空间水土过程试验微区,通过人工模拟降雨试验,研究不同雨强下(52,133 mm/h)岩溶管道孔径大小(1,2,5 cm)对水土地下漏失过程的影响。结果表明:(1)岩溶管道孔径的增大显著增大了地下径流系数和径流强度,但对初始产流时间的影响并不显著;在中雨强(52 mm/h)条件下,随着孔径的增大,初始产流所需要的时间也相应延长;在大雨强(133 mm/h)条件下则相反。(2)随着孔径的增大,中雨强(52 mm/h ...
司琴 +4 more
doaj
Shuitu Baochi Xuebao[目的] 西南喀斯特区土壤侵蚀问题十分突出,严重影响着区域社会经济的可持续发展。而喀斯特流域特征环境因子如何影响土壤侵蚀的直接驱动力—径流侵蚀力,目前尚不十分明晰。[方法] 以西南喀斯特地区的野纪河流域为例,基于流域出口水文站长系列高频实测数据,采用水土评估工具(SWAT)和偏最小二乘模型(PLSR)评估了2005—2020年流域径流侵蚀力的时空演变特征,解析了主要喀斯特环境因子对径流侵蚀力的影响。[结果] 流域多年平均径流侵蚀力为2 326.47 m4/(km2·s),并具有较强的空间异质性 ...
赵丽娜, 李瑞, 袁江, 敬俊
doaj
Leaf anatomy of different peony and its environmental adaptability [PDF]
[Objective] We aim to investigate the morphological adaptation characteristics of peony in different habitats to the environment in the plain areas, and to provide references for peony conservation research and screening of high-quality germplasm ...
HE Songlin +5 more
core +1 more source
Shuitu Baochi Xuebao, 2008 对贵州中部喀斯特山区不同土地利用方式(阔叶林地、灌木林地、灌丛草地、耕地)对土壤、地表径流和浅层地下水进行采样与分析。结果表明,在喀斯特山区土地利用模式从阔叶林地—灌木林地—灌丛草地方向的演变过程中,土壤有机质、速效氮磷钾、交换性钙镁含量出现明显的下降,粘粒含量增加,土壤质量出现退化,耕地有机质含量明显低于林地和草地;耕地地表径流中SO42-,NH4 ,PO43-,COD均显著高于林地和草地;浅层地下水的SO42-,NH4 ,NO3-,PO43-,COD也显著增加;土地利用由林地变为耕地后 ...
苏跃 +5 more
doaj