Based on the field survey and 4 series of remote sensing data of soil and water loss , the temporal and spatial change of soil and water loss in zhejiang province was analyzed 摘要本文在野外考察和4次遥感调查的基础上，分析了浙江省水土流失的时空演变。
Wind - field diagnostic analysis and historical observation data are used to reveal general flow patterns of lower atmosphere over beijing area 用风场诊断方法和实际观测资料对北京地区低层大气的背景流动情况进行分析，获取当地流动时空演变的总体型式或模态。
Furthermore land use spatial pattern composed of the land use patch type , amount , size , figure , edge character , location and so on contained abundant land use temporal and spatial evolvement information 而由土地利用斑块的类型、数量、大小、形状、边缘特征、位置空间关系等决定的土地利用空间格局，更蕴含着土地利用丰富的时空演变信息。
On the basis of the results of study on spatio - temporal evolution of pred system in jixi county , the tactics of sustainable development are put forward , which is the foundation and carry out sustainable development strategy 3 、绩溪县pred系统可持续发展对策。根据绩溪县pred系统时空演变研究结果，提出pred系统可持续发展对策，为绩溪县制定与实施可持续发展战略提供依据。
Therefore , it is imperative to develop regional ecological security and control patterns for wetlands , and undertake relevant key and fundamental researches to facilitate rehabilitation and conservation of the hydro - ecosystem and water environment in the huang - huai - hai region 拟解决的关键科学问题： 1 、湿地系统组分间的耦合机理及其时空演变规律； 2 、变异条件下湿地系统功能退化、修复及维持的水系统动力机制； 3 、湿地系统生态安全调控机理。
The variations of sea ice in the arctic ocean are simulated by using a improved high resolution hibler dynamic - thermodynamic sea ice model during 1979 - 1998 . the model is driven by surface atmospheric and oceanic forcing consists of geostrophic winds , surface air temperature , specific humidity , and longwave and shortwave radiative fluxes provided by international arctic buoy program ( iabp ) . the simulated results show that arctic sea ice have noticeable seasonal and annual variability 利用一个hibler海冰热动力模式，在改进了其热力部分和改变模拟范围以及提高分辨率的基础上，以北极国际浮标计划( iabp )提供的1979 - 1998年间逐日变化的日平均海平面气温场，湿度场，长短波辐射场，风场，洋流场，海洋热流量场为强迫场，模拟了上述20年间北极海冰的时空演变。
This article , with the help of gis , first uses geostatistics to study temporal and spatial changing of soil fertility factors , such as oganic matter total n total p , total k available k available p ph and cec , in wujin city in nearly 20 years , and draws these conclusions : soil acidification of large area exists in the city , the content of n is generally lower but it tends to rise , the content of p and k is lower and it ' s still lowering , the content of organic matter is medium but it tends to add , cec ' s quality grade is higher but its content is lowering 土壤肥力质量时空演变对于农业生态与社会、经济的持续发展意义重大，而gis在土壤肥力质量评判中发挥日益重要的作用。本文首先基于gis支持下，运用地统计学，研究了武进市近20年全n 、全p 、全k 、有效p 、有效k 、 ph 、 cec和有机质等土壤肥力要素的时空分异状况，得出：存在大面积土壤酸化现象、 n素含量总体较差但趋于提高、 p素和k素含量较低且继续降低、有机质含量中等但有增加趋势、 cec质量等级较高但含量趋下降。
The paper concluded that it was helpful to enhance the efficiency of monitoring the changes of the land types using the modern land information technology , and a lot of factors must be considered in the process of the land reclamation , such as the technology , planning , the foundation and to establish a successive mineral environment 研究结果：以山西省平朔安太堡露天矿为例，采用不同的标准划分了不同的土地类型，提出了露天矿不同土地分类标准之间的联系及破坏分类标准下土地类型的动态变化过程，通过土地类型的单一土地利用动态度及转移总量变化矩阵来分析矿区土地类型的数量变化，突出了土地类型之间的时空演变规律并反映了露天矿区土地类型演变迅速、破环剧烈的特点。
The factors that decide the form and development of highway network are explored . the research field covers the commonly developed law of local space distribution . ( 2 ) begin with mode analysis of transportation economy evaluated with time span , it is investigated gather - scatter effect of expressway ( 2 )从交通经济带时空演变的模式分析入手,研究高速公路聚散效应以及引导区域空间结构演化及经济发展的形成条件与进程,在实证分析的基础上总结了高速公路经济带对公路网布局规划的启示。
Based on the data of the depth to groundwater table below land surface with observational wells in 1975 , 1980 , 1985 , 1990 , 1995 , 2000 of the hebei plain , adopting gis technic and kriging interpolation method , this paper analyzes the spatio - temporal change of groundwater level in the past 25 years in hebei plain 根据1975 1980 1985 1990 1995 2000年的地下水位观测资料，利用gis技术，采用kriging插值方法，分析了近25年来河北平原地下水位的动态变化过程，揭示了地下水位的时空演变规律，并探讨了地下水位下降的原因。
