检索结果-南通市图书馆

Effects of water level variations on the water quality of Huayang Lakes,China

Journal of Geographical Sciences 2025年第1期35卷 173-188页

作者： AN Lesheng LIU Chun FAN Zhongya liao kaihua WANG Wencai WANG Nan School of Resources and Environment Anqing Normal UniversityAnqingAnhui246133China South China Institute of Environmental Sciences Ministry of Ecology and EnvironmentGuangzhou510655China The Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyCASNanjing210008China

To explore water level variations and their dynamic influence on the water quality of Huayang Lakes,the water level from 1967 to 2023 and water quality from 2015 to 2023 were analyzed using the Mann–Kendall trend test,box plots,and violin *** results show a notable hydrological rhythm of water level alternation between dry and flood seasons in Huayang Lakes,with an average water level of 12.82 m and a monthly range of 11.21–*** 2017,the water level of Huayang Rivers has shown a decreasing trend of–0.02 m/*** phosphorus(TP)has become the primary *** TP concentrations in Longgan Lake(the largest lake)during the dry,rising,flood,and retreating seasons from 2015 to 2023were 0.083,0.061,0.050,and 0.059 mg/L,*** effect of water level on TP was mainly observed during the low-water *** the water level in the dry season rose to 12.25 and 13.00 m,the percentage of TP exceeding 0.1 mg/L in Longgan Lake decreased to 55.8%and 33.3%,*** the dry season,wind and wave disturbances caused the release of endogenous phosphorus in Huayang *** led to drastic fluctuations in TP concentration,reducing the correlation between water level and *** external control is limited,the water level during the dry season should be maintained between 12.25 and 13.0 ***,it is necessary to accelerate the restoration of submerged macrophyte species(such as Hydrilla verticillata and Vallisneria natans)in the Huayang Rivers.

关键词： shallow lake water level water quality total phosphorus Huayang Lakes

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Influence of river-lake isolation on the water level variations of Caizi Lake, lower reach of the Yangtze River

引用

Journal of Geographical Sciences 2021年第4期31卷 551-564页

作者： AN Lesheng liao kaihua ZHU Lei ZHOU Baohua School of Resources and Environment Anqing Normal UniversityAnqing 246133AnhuiChina Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyCASNanjing 210008China

In order to explore the water level variations of Caizi Lake under river-lake isolation,the monthly water level of the Chefuling station in Caizi Lake from 1989 to 2018 and the daily water level,rainfall and flow of local hydrological stations in 2018 were analyzed by using the Mann-Kendall trend test and wavelet *** showed that the difference of the average water level of Caizi Lake between the flood and dry seasons was 3.34 m,with a multi-year average water level of 10.42 m above sea *** first and second main periods of the water level of Caizi Lake were 128 and 18 months,respectively,with 4 and 29"up-down"cycles,*** 2018,the next 3-4 years were likely to be the low water level *** water level of Caizi Lake was significantly correlated with that of the Anqing hydrological station of the Yangtze River(r=0.824,P<0.01).In addition,the current hydrological staging of Caizi Lake was about 30 days behind than before the sluice was *** the dual influences of the river-lake isolation and the Yangtze-to-Huaihe Water Diversion Project(YHWD),the hydrological regime change of Caizi Lake and its eco-environmental effect needed long-term monitoring and research.

关键词： water level hydrological regime river-lake isolation wavelet analysis Caizi Lake

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Response of soil hydrological processes to soil rock fragments:A global Meta-analysis

引用

Science China Earth Sciences 2023年第9期66卷 2066-2080页

作者： Yongwu WANG Qing ZHU Xiaoming LAI kaihua liao Changqiang GUO Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China College of Nanjing University of Chinese Academy of SciencesNanjing 211135China

The rock fragment(RF)has been widely observed in the soil solum or on the soil *** regulates soil hydrological processes(SHPs)and thus has great impacts on soil and water ***,responses of SHPs to RF characteristics(position,content,coverage area,mulching thickness,and size)remain *** on the dataset extracted from 168 published studies,effects of RF characteristics on SHPs(soil loss rate,evaporation rate,surface runoff rate,infiltration rate,soil water content,and soil water storage)and saturated hydraulic conductivity(Ks)were discussed in this *** showed that RFs completely inserted into the soil solum(CO_INS)improved the Ks by 6.9%,runoff rate by 12.8%,and soil loss rate by 22.3%,while it reduced the evaporation rate by 30.7%,infiltration rate by 15.4%,and soil water content by 9.9%.With the RF content(kg kg−1)increasing,its effects on these SHPs were *** RFs resting on the surface and partially covering soil surface(PA_COV)improved the infiltration rate but reduced the evaporation rate by 36.9%,surface runoff rate by 25.4%,and soil loss rate by 59.3%.This in turn enhanced soil water content and ***,as the RF coverage(%in area)increasing,the cross-sectional area of water flow decreased,and thus the infiltration rate *** RFs completely mulch on the soil surface(CO_MUL)reduced the evaporation rate by 59.5%and infiltration rate by 76.5%but improved the soil water content and *** the infiltration rate,the effects of CO_MUL on SHPs were strengthened as mulch thickness(cm)*** RFs partially embedded into soil surface(PA_EMB)promoted surface runoff rate by 15.3%,soil loss rate by 34.7%,and soil water content by 24.3%,but reduce the infiltration ***,the surface runoff rate was reduced at high embedded coverage due to increased tortuosity of water *** addition,the RF size exerted weaker effects on SHPs than RF positions,content,coverage,and mulch *** findi

关键词： Critical zone Meta-analysis Soil hydrology Soil water Watershed

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Evaluation of nine major satellite soil moisture products in a typical subtropical monsoon region with complex land surface characteristics

引用

International Soil and Water Conservation Research 2022年第3期10卷 518-529页

作者： Liuyang Li Ya Liu Qing Zhu kaihua liao Xiaoming Lai Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing210008China University of Chinese Academy of Sciences Beijing100049China

Assessing accuracies of satellite soil moisture(SM)products in areas with strong anthropogenic activities,abundant precipitation,and dense vegetation is important but *** this study,performances of nine satellite SM products,including the European Space Agency Climate Change Initiative(ESA CCI),and the ascending and descending products of the Advanced Microwave Scanning Radiometer 2(AMSR2),Chinese Fengyun-3B(FY3B),Chinese Fengyun-3C(FY3C),and Soil Moisture Active Passive(SMAP),were evaluated against in-situ SM in the Yangtze River Delta(YRD)from 2015 to *** showed that the ESA CCI outperformed other products,with averaged correlation coefficient(R)of 0.522,correlation coefficient for SM anomalies(Rano)of 0.419,and unbiased root mean square error(ubRMSE)of 0.040 m^(3)m^(-3),followed by the SMAP_A and SMAP_*** was observed in the AMSR2 products(Bias>0.081 m^(3)m^(-3)),while underestimation was found in the FY3B and FY3C products(Bias<-0.104 m^(3)m^(-3)).Moreover,R values decreased with the increase in water area percentage(WAP),land cover heterogeneity(GSI),fractional vegetation cover(FVC),and precipitation(PRE).Threshold values were observed at 3%for the WAP,0.05 for the FVC,and 900 mm yr^(-1)for the PRE,below which sharp declines of accuracy were *** WAP,GSI,and FVC were divided into five sub-classes with their values increasing with the sub-class level(I to V).Correlations coefficients between these perturbing factors and R(correlation between satellite and in-situ SM)increased as sub-class levels *** sub-classes I,II,and III,these three factors had limited influences on accuracies of satellite SM ***,under sub-classes IV and V,significant impacts of these three perturbing factors were ***,when sub-classes of the PRE increased from I to V,correlations between Bias and PRE decreased first and then *** findings can help to determine suitable satellite SM products in the YRD and s

关键词： Remote sensing Soil moisture Soil water content The yangtze river delta

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Soil Moisture Response to Rainfall in Forestland and Vegetable Plot in Taihu Lake Basin,China

引用

Chinese Geographical Science 2015年第4期25卷 426-437页

作者： LI Qian ZHU Qing ZHENG Jinsen liao kaihua YANG Guishan Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and Limnology Chinese Academy of Sciences University of Chinese Academy of Sciences

Soil moisture and its spatial pattern are important for understanding various hydrological,pedological,ecological and agricultural *** this study,data of rainfall and soil moisture contents at different depths(10 cm,20 cm,40 cm and 60 cm) in forestland and vegetable plot in the Taihu Lake Basin,China were monitored and analyzed for characteristics of soil moisture variation and its response to several typical rainfall *** following results were ***,great temporal variation of soil moisture was observed in the surface layer than in deeper layer in vegetable *** contrast,in forestland,soil moisture had similar variation pattern at different ***,initial soil moisture was an important factor influencing the vertical movement of soil water during rainfall *** vegetable plot,simultaneous response of soil moisture to rainfall was observed at 10-and 20-cm depths due to fast infiltration when initial soil was relatively ***,traditional downward response order occurred when initial soil was relatively ***,critical soil horizon interface was an active zone of soil water accumulation and lateral movement.A less permeable W-B soil horizon interface(40-cm depth) in vegetable plot can create perched water table above it and elevate the soil water content at the corresponding ***,the land cover was an effective control factor of soil moisture during small and moderate rainfall *** the forestland,moderate and small rainfall events had tiny influences on soil moisture due to canopy and surface O horizon ***,preferential flow and lateral subsurface interflow were important paths of soil water *** large and long duration rainfall events,lateral subsurface flow and preferential flow through surface crack or soil pipe occurred,which recharged the deep ***,in more concentrated large storm,surface crack or soil pipe connected by soil macropores was the main contributor to the occ

关键词： hydropedology soil hydrology soil water content precipitation preferential flow

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

东南湿润区坡面土壤水文过程研究进展与展望

引用

地理科学进展 2018年第4期37卷 476-484页

作者：廖凯华吕立刚中国科学院南京地理与湖泊研究所中国科学院流域地理学重点实验室南京210008 国土资源部海岸带开发与保护重点实验室南京210023

东南湿润区是我国生态环境问题最为突出的区域之一,水体的富营养化是困扰该区域经济和社会发展的主要问题。尤其近些年来,在政府鼓励和市场推动双重作用下,丘陵山区的开发力度逐步加强,越来越多的原生态竹林被开发为经济型用地(如茶园)... 详细信息

东南湿润区是我国生态环境问题最为突出的区域之一,水体的富营养化是困扰该区域经济和社会发展的主要问题。尤其近些年来,在政府鼓励和市场推动双重作用下,丘陵山区的开发力度逐步加强,越来越多的原生态竹林被开发为经济型用地(如茶园)。但该土地利用方式的转变在带来经济效益的同时,也改变了下垫面土壤孔隙结构和土壤水文过程,从而极大地影响着营养盐随土壤水分的迁移和转化。在国家自然科学基金青年科学基金项目"太湖流域丘陵区坡面土壤水文过程物理机制及模拟研究"的资助下,在以下3个方面取得了重要进展:(1)不同土地利用坡面土壤水分时空变化与影响因素;(2)坡面水文过程与水量平衡;(3)坡面土壤水文过程影响机制。目前对太湖流域丘陵区土壤水文过程研究虽取得一些进展,但其影响机制仍不十分明确,有待进一步深入的探讨。上述成果的取得以及未来的持续探索,对于太湖水体富营养化与流域面源农业面源污染控制具有重要的环境意义,进而为推动我国流域生态文明建设提供理论支持。

关键词：太湖流域坡面尺度土壤水文过程数值模拟影响因素

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

产芝水库灌区农田水分转化及节水灌溉模式分析

引用

农业工程学报 2010年第5期26卷 45-51页

作者：廖凯华徐绍辉程桂福林青青岛大学环境科学系青岛266071 南京大学水科学系南京210093 青岛市水利局青岛266071

在长期田间试验的基础上,建立了产芝水库灌区典型农田的土壤水分运动模型。结果表明,常规灌溉条件下灌区农田水分的无效渗漏量较大,降水和灌溉与土壤深层渗漏和农田蒸散量之间存在明显的正相关关系。基于作物的土壤水分调节标准,模拟得... 详细信息

在长期田间试验的基础上,建立了产芝水库灌区典型农田的土壤水分运动模型。结果表明,常规灌溉条件下灌区农田水分的无效渗漏量较大,降水和灌溉与土壤深层渗漏和农田蒸散量之间存在明显的正相关关系。基于作物的土壤水分调节标准,模拟得到灌区不同降水年型的节水灌溉模式,与常规灌溉相比,节水灌溉模式在丰水年可节省水240mm,平水年140mm,枯水年为90mm,并且农田渗漏量显著低于常规灌溉,丰水年、平水年和枯水年的全年平均农田渗漏强度分别减少了0.66、0.35和0.27mm/d。在作物关键生育期合理控制灌水量,能够保证作物正常需水的同时减少土壤水的无效渗漏,从而提高灌溉水的利用效率。

关键词：灌溉土壤水分渗漏产芝水库灌区节水

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

太湖流域丘陵区两种土地利用类型土壤水分分布控制因素

引用

生态学报 2016年第3期36卷 592-599页

作者：徐飞赖晓明朱青廖凯华中国科学院南京地理与湖泊研究所流域地理学重点实验室南京210008 中国科学院大学北京100049

为探究太湖流域丘陵区典型土地利用类型(如竹林地和茶园)土壤水分的控制因素,在不同深度土壤水分定期观测的基础上,根据前7d降雨量将研究时段划分为干旱状态和湿润状态,利用分类与回归树(CART)方法得出不同干湿状态下土壤水分分布的主... 详细信息

为探究太湖流域丘陵区典型土地利用类型(如竹林地和茶园)土壤水分的控制因素,在不同深度土壤水分定期观测的基础上,根据前7d降雨量将研究时段划分为干旱状态和湿润状态,利用分类与回归树(CART)方法得出不同干湿状态下土壤水分分布的主控因子,并借助典范对应分析(CCA)定量分析不同土地利用类型、不同土壤深度土壤水分格局与环境因子关系。结果表明:(1)高程、土地利用类型和土层厚度对土壤水分分布的相对贡献率最大,但在不同干湿状态下其影响程度存在差异;(2)干旱状态时土壤水分主要受高程、坡度、地形湿度指数(TWI)和剖面曲率等地形因素的作用,而土层厚度和粘粒也分别为0—20 cm和20—40 cm深度土壤水分的主控因子;(3)在湿润状态下,茶园0—20 cm土壤水分的主控因素为地形因子,在20—40 cm则以土壤性质为主,竹林地两个深度的土壤水分受地形和土壤性质的作用都很强,其中20—40 cm深度土壤水分与环境因子的关系较0—20 cm深度更为复杂。

关键词：太湖流域土壤水分环境因子主控因子

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

流域多尺度土壤水分监测与模拟研究进展

引用

地理科学进展 2019年第8期38卷 1150-1158页

作者：朱青廖凯华赖晓明刘亚吕立刚中国科学院南京地理与湖泊研究所中国科学院流域地理学重点实验室南京210008 中国科学院大学北京100049 南京财经大学公共管理学院南京210023

土壤水分调控着陆地表层系统空间格局和过程,作为地表不同圈层中物质和能量输移转化的关键纽带和驱动力,连接着一系列的水文、生态、气候和地质学过程。论文首先介绍了流土壤水分静态特征(土壤含水量和基质势时空变化)在流域范围内不同... 详细信息

土壤水分调控着陆地表层系统空间格局和过程,作为地表不同圈层中物质和能量输移转化的关键纽带和驱动力,连接着一系列的水文、生态、气候和地质学过程。论文首先介绍了流土壤水分静态特征(土壤含水量和基质势时空变化)在流域范围内不同空间尺度上监测方法的优缺点,包括直接手动监测、直接自动监测、地球物理探测和遥感监测等;同时介绍了其动态特征(土壤水分运动)监测方法(径流小区法、示踪剂法和地球物理探测)的局限性和模拟模型(动力波模型、水量平衡模型和水动力模型等)的关键参数和过程。在此基础上提出了:①加强土壤水分监测尺度与方法的集成;②消除土壤水分运动模型不确定性;③耦合土壤水分与碳氮输移循环过程等3个方面的研究展望和建议,从而为高时空分辨率和高精度的土壤水分数据获取,以及土壤水分运动与分布及其驱动下的碳氮排放过程、机理的揭示和模拟提供新的研究视角与思路。

关键词：地球关键带空间尺度水文土壤学土壤墒情

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

土壤CEC的影响因子及Cokriging空间插值分析——以青岛市大沽河流域为例

引用

土壤学报 2010年第1期47卷 26-32页

作者：廖凯华徐绍辉程桂福林青青岛大学环境科学系山东青岛266071 青岛市水利局山东青岛266071

运用地统计和多元回归分析方法,探讨大沽河流域土壤阳离子交换量(CEC)的空间变异和影响因子。结果表明,上下层土壤CEC与有机质、黏粒和粉粒含量有着显著的正相关,而与砂粒含量则存在显著的负相关,其中与黏粒含量的相关系数最大,与粉粒... 详细信息

运用地统计和多元回归分析方法,探讨大沽河流域土壤阳离子交换量(CEC)的空间变异和影响因子。结果表明,上下层土壤CEC与有机质、黏粒和粉粒含量有着显著的正相关,而与砂粒含量则存在显著的负相关,其中与黏粒含量的相关系数最大,与粉粒含量的相关性最弱;对CEC的贡献能力依次为黏粒>有机质>砂粒,黏粒的贡献能力平均为有机质的1.5～2.5倍;以黏粒为辅助变量的Cokriging(COK)较之Ordinary Kriging(OK)能提高插值精度,上下层均方根误差RMSE值分别减少了18.94%和41.05%,辅助变量与主变量的相关程度决定了估值的精度;大沽河流域中东、西北部及西南方向中部地区土壤CEC较高,而北部与西南角局部地区土壤CEC保肥能力非常弱,是以后土壤改良的重点地区,可通过增施有机肥以及改土培肥等措施来提高土壤肥力水平。

关键词：大沽河流域土壤阳离子交换量空间变异影响因子

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：