Geographical Science Research最新文献

{"title":"山西省城市旅游竞争力评价 Evaluation of Urban Tourism Competitiveness in Shanxi Province","authors":"马艳红, 牛娟","doi":"10.12677/GSER.2017.64029","DOIUrl":"https://doi.org/10.12677/GSER.2017.64029","url":null,"abstract":"随着国民经济的增长，人民生活水平提高，旅游业得到了快速发展，进入了发展的黄金阶段。山西省作为中部城市，为了实现经济崛起，近年来开始大力发展旅游业，而衡量旅游业发展的一个重要指标则是城市旅游竞争力。文章通过构建城市旅游竞争力的评价体系，以山西省11个地级市为研究对象，采用SPSS22.0中的因子分析法对11个城市的旅游竞争力进行了正确的评价。根据城市旅游竞争力综合得分的高低不同，将山西省11个地级市划分成旅游竞争力强势型、旅游竞争力优势型、旅游竞争力发展型、旅游竞争力弱势型四个层次，并对各层次的旅游竞争力城市提出相应的发展措施，从而促进山西省经济的发展。 With the growth of national economy and the improvement of people’s living standard, tourism has developed rapidly and entered the golden stage of development. Shanxi, as a central city, has begun to develop tourism in recent years in order to achieve economic growth, and an important indicator of tourism development is the competitiveness of urban tourism. By constructing the evaluation system of urban tourism competitiveness, this paper takes 11 prefecture level cities in Shanxi Province as the research object, and uses the factor analysis method in SPSS22.0 to make a correct evaluation of the tourism competitiveness of 11 cities. According to the comprehensive score of city, tourism competitiveness is different, the four levels of the 11 prefecture level city in Shanxi province is divided into strong tourism competitiveness, tourism competitive edge, tourism competitiveness development, tourism competitiveness weak. And city tourism competitiveness of all levels put forward the corresponding development measures, so as to promote the economic development of Shanxi province.","PeriodicalId":171984,"journal":{"name":"Geographical Science Research","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131576201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distribution and Driving Forces Analysis of Abandoned Cultivated Land in Wulong District, Chongqing","authors":"郭 雨晨","doi":"10.12677/GSER.2017.64027","DOIUrl":"https://doi.org/10.12677/GSER.2017.64027","url":null,"abstract":"随着城市化以及农村发展转型，耕地撂荒在全球范围内呈现出加速扩散和蔓延的态势。近年来，我国耕地撂荒也频见报道，尤其是在山区。但是，我国目前的耕地撂荒数据多以小区域的调查数据为主，难以提供撂荒耕地的详细空间信息，不利于全面了解撂荒耕地的规模以及空间分布特征。因此，本文选取了具有典型山地特征的重庆市武隆区作为研究区，以2005年和2011年土地利用图作为基础，通过耕地的转移变化提取了武隆区耕地撂荒空间分布现状。结果表明，2005年，武隆区耕地总面积为819.02 km2；2005~2011年间，区内耕地撂荒面积为101.86 km2，撂荒率为12.44%。其中，水田撂荒面积15.96 km2，旱地撂荒面积85.9 km2，耕地的撂荒主要以旱地为主。在撂荒耕地的影响因素方面，高程、坡度和劳动力因素对耕地撂荒的影响较为明显。 Due to the rapid urbanization and rural development transformation, cropland abandonment has shown accelerating expansion trends worldwide. In recent years, phenomenon of cropland aban-donment in China is also frequently reported, especially in the mountainous areas. However, most of the previous researches on cropland abandonment are based on the survey data in a small region, which could not provide the detailed spatial information. The demerits of cropland abandonment data go against the understanding of the size and spatial distribution characteristics of abandoned cropland. Therefore, this paper aims to analyze the spatial distribution of cropland abandonment in Wulong County of Chongqing Municipality. To identify the abandoned cropland, we analyzed the conversions of cropland based on the land use map in 2005 and 2011. The results show that: 1) in 2005, the cropland area of Wulong County was as high as 819.02 km2; 2) during 2005-2011, the total area of abandoned cropland was 101.86 km2, accounts for 12.44% of cropland area; 3) the abandoned cropland were mainly converted from the dry land, reaching 85.9 km2, while the abandoned area converted from the irrigated land was only 15.96 km2; 4) elevation, slope, and labor force are the key factors driving the cropland abandonment.","PeriodicalId":171984,"journal":{"name":"Geographical Science Research","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124779909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"基于国家自然科学基金资助的中国城市地理学研究热点分析 Urban Geography Research Progress and Trends Analysis Based on National Natural Science Foundation of China","authors":"郑芳, 侯迎, 程仕瀚","doi":"10.12677/GSER.2017.64024","DOIUrl":"https://doi.org/10.12677/GSER.2017.64024","url":null,"abstract":"论文基于近五年资助的247项城市地理主题的国家自然科学基金项目，在分析项目构成、研究对象(尺度)、研究要素、研究主题(核心主题)、研究视角、理论与方法及学科构成基础上，得出了初步结论；项目主要集中在青年项目和面上项目，地区项目较少，优秀青年项目及重点项目的资助空间较大。当前研究中尚存在可实现突破的领域，包括：1) 研究尺度可侧重于微观尺度的研究，实现微观、宏观相结合；2) 关注特殊群体，包括城市贫困人口、老年人、儿童、流动人口及女性等；3) 加强中西部城市、中小城市及特殊类型城市的研究，扩大研究案例范围；4) 在格局–机制研究的基础上，加强过程研究，实现自然–人文过程耦合，侧重过程模拟及预测；5) 强化多学科交叉融合，加强历史地理、医学及健康地理、犯罪地理、城市规划等学科与城市地理的交叉融合研究；6) 关注要素研究的同时强化系统研究，实现由要素研究向系统研究转变；7) 加强大小数据相结合。 Based on 247 urban geography projects that funded by National Natural Science Foundation of China (NSFC) from year 2012 and 2016, projects composition, research objects(spatial scale), re-search elements, research topics (and core topics), research perspectives, theory, methods and disciplines are analyzed and concluded. Projects are composed of Youth projects and General projects, Regional projects are few, Outstanding young projects, Major projects and other types are lacked, and this phenomenon leaves a broad space for future foundation. Through the analysis, it needs breakthrough in the following fields. 1) Research scale can be focused on microscale, realizing combination of macro research and micro research; 2) Special population groups can be expanded, including urban poor, old people, children, floating population and women; 3) Study cases should be emphasized on middle and west cities, medium and small-sized cities and special type of cities, increasing studying case numbers; 4) About the three core topics: urban structure, urban mechanism and urban process, urban process should be more focused on realizing human and natural process coordination, strengthening process simulation and forecasts in future; 5) In-tegrating multiple relative disciplines, such as historical geography, medical and health geography, criminal geography and urban planning; 6) Enhancing systematic research, realizing transfor-mation from element research to system research; 7) Combining big data application into basic data collection.","PeriodicalId":171984,"journal":{"name":"Geographical Science Research","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128649678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"牧区聚落时空特征及驱动力分析—以正蓝旗为例 An Analysis to the Settlement and Evolution Characteristics and Driving Forces of Pastoral Areas—A Case Study of Zhenglan Banner","authors":"张素丽, 佟宝全","doi":"10.12677/GSER.2017.63017","DOIUrl":"https://doi.org/10.12677/GSER.2017.63017","url":null,"abstract":"基于GIS的空间分析方法，采用2000、2017年遥感影像和DEM为数据源，运用景观格局指数、核密度估计、统计分析方法，探讨典型草原牧区正蓝旗在2000~2017年聚落的时空分布特征，进一步分析聚落形成与发展的主要影响因素。结果表明：① 2000~2017年的17年间，正蓝旗聚落分布及规模的时空特征呈现急速增长的态势，聚落分布整体较为聚集，呈“南密北疏”的空间差异，整体分布格局与该研究区的地形地貌类型密切相关。② 区域上，聚落分布格局呈现出明显的区域差异性。随着海拔和河流的变化，聚落斑块数和规模趋于正态分布态势，随着道路和坡度的变化，聚落斑块数和规模布局均逐级递减。③ 水文、交通及地形地貌等地理要素对正蓝旗聚落区位的选择起到很大的限制作用，这三个因素也是决定聚落空间分布的主导因素。总体上，分析本牧区聚落的发展变化及驱动力，可对整个牧区聚落空间布局调整、优化提供重要的借鉴价值。 Based on GIS spatial analysis method, the settlements distribution and evolution characteristics of Zhenglan Banner, a typical prairie area is discussed in this paper by using remote sensing images and DEM data sources from 2000 to 2017, landscape pattern index, kernel density, and statistical analysis. Meanwhile, the main driving factors are analyzed. The results show that: ① From 2000 to 2017, the evolution and settlement distribution scale of Zhenglan Banner has been growing rapidly, and the settlement distribution is relatively gathered, and shows a space difference, that is, “dense in the south and hydrophobic in the north”. The overall distribution pattern is closely related to the land types in the study area. ② The settlement distribution in the area shows obvious regional difference. With the change of elevation and river, the number and scale of settlements tended to be normal distribution. With the change of road and slope, the number of patches and scale of settlements decreased gradually. ③ The hydrology, traffic and topography, even as leading factors and other geographical factors, dominantly restricted the settlement location of Zhenglan banner. On the whole, the study of the development, change and formation mechanism of Zhenglan banner can be of great value to the adjustment and optimization of the spatial layout of the whole pastoral area.","PeriodicalId":171984,"journal":{"name":"Geographical Science Research","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122135008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"异龙湖水质参数的季节性变化 Seasonal Changes of Water QualityParameters in Lake Yilong","authors":"刘培, 常凤琴, 张虎才, 李华勇, 毕荣鑫, 段立曾, 付磊, 周瑜","doi":"10.12677/GSER.2017.63019","DOIUrl":"https://doi.org/10.12677/GSER.2017.63019","url":null,"abstract":"本文对2016年9月、10月、11月和2017年1月、3月、5月异龙湖不同湖区的温度(Temp)、叶绿素a(Chl-a)、溶解氧(DO)以及pH的水质参数特征进行分析，结果表明：异龙湖水质最好的是湖西北，坝心与湖心位置水质没有明显差异，主要是由于湖西北水生植物对湖水的净化作用；湖西北部9月、10月水深1m左右开始出现DO骤降现象形成缺氧环境，且不同季节溶解氧降低的深度和幅度各不相同；湖泊富营养化指标中的叶绿素a在异龙湖整个湖体中存在明显的季节性变化。不仅如此，不同湖区有所不同，其中坝心与湖心位置表现为1月浓度达到最大值，湖西北则是9月和10月为最大值；在所监测的月份中，异龙湖pH值的变化是多种因素综合作用的结果，其中水体藻类的浓度对其有主导作用。通过水质参数分析不同湖区水质差异，认为异龙湖水质恶化的主要原因是人类活动影响的结果。所以今后的发展中，必须重视水资源的有效保护和生态环境的修复与重建，充分加强科学监测、科学管理、科学治理，落实可持续发展思想，改善湖泊流域生态环境。 Based on the analysis of water quality parameters, including temperature, chlorophyll-a (Chl-a), dissolved oxygen (DO) and pH of the Lake Yilong during September 2016 to May 2017, the water quality and its spatial-temporal variations were discussed. The results showed that the best water quality of the lake appears in northwest of the lake, attributing to the purification of aquatic plants in the area. There is no notable difference between the water quality in the Dam and center of the lake. The appearances of a DO plunge in the northwest of the lake in September and October re-sulted in a hypoxia condition in the lake water, and it was found that the depth and amplitude of this DO reduction varies from one place to another, with the seasonal difference. The Chl-a con-centration in Lake Yilong showed seasonal and spatial changes too. In the center and the Dam area of the lake, the maximum value occurs in January. However, in the northwest of the lake, the maximum value appears in September and October. The variations of pH of the lake water indicated a strong linkage with algae concentrations. Based on the analysis of water quality parameter in different sites of the lake, it was concluded that the main reason for water quality deterioration of Lake Yilong is unreasonable anthropogenic activities in the area. Therefore, it has been suggested that more attentions should be addressed on effective water quality protection and ecological restoration in the future. Most importantly, all the measurements concerning on the lake water utilization and so-called lake environmental protection should be based on the detailed scientific monitoring, administration and application. This is the only way to keep a sustainable development, with improvement of the eco-environmental in the drainage area.","PeriodicalId":171984,"journal":{"name":"Geographical Science Research","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128100524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"满洲里市土地利用动态变化及其驱动力分析 Research on Dynamic Variation of the Land Use and Its Driving Force in Manzhouli City","authors":"史静, 海春兴, 刘君, 高文邦, 姜洪涛","doi":"10.12677/GSER.2017.63021","DOIUrl":"https://doi.org/10.12677/GSER.2017.63021","url":null,"abstract":"满洲里市是我国最大的内陆边境口岸城市，随着边境贸易的发展，土地利用类型也随之发生变化。本文采用土地利用动态度、土地利用结构信息熵，以及灰色关联分析方法对该区域土地利用变化及其驱动机制进行了分析。结果表明：满洲里市的土地利用数量变化主要表现为居民点及工矿用地和交通运输用地对牧草地的占用；土地利用结构信息熵和均衡度呈现增长趋势，土地利用结构趋于均质性化发展；近10年来，满洲里市的土地利用变化主要受到旅游业和口岸经济的影响。 Manzhouli city is the largest inland border city of our country. With the development of border trade, great changes have taken place in the land use type in Manzhouli city. The article analyzed land use change and its driving mechanism by using the methods of dynamic degree and the in-formation entropy of land use structure method and grey correlation analysis. The results showed that the land use quantity change mainly for residential areas and mining land and transportation land to grassland utilization, the land use structure information entropy and equilibrium degree showed an increasing trend and the land use structure tend to homogeneity development. In recent 10 years, the land use change of Manzhouli city is mainly affected by the economy of tourism and port.","PeriodicalId":171984,"journal":{"name":"Geographical Science Research","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134178536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"基于RS、GIS的呼包鄂地区植被覆盖度变化研究 Research on Dynamic Change of Vegetation Coverage in Hohhot, Baotou, Ordos Area Based on RS and GIS","authors":"萨日娜","doi":"10.12677/GSER.2017.63020","DOIUrl":"https://doi.org/10.12677/GSER.2017.63020","url":null,"abstract":"本文以呼包鄂地区为研究区，以MODIS的NDVI数据16日最大合成法合成的MYD13Q1产品为数据源，借助ENVI、ArcGIS平台，对研究区的10年植被覆盖度进行了动态变化研究。其中首先计算了2003、2005、2007、2009、2011、2013年植被覆盖度，其次计算10年平均植被覆盖度，最后分析了2003年至2013年植被覆盖度转移，从而得出的结论是呼包鄂地区中部植被覆盖度较高，南北较低。2003~2009年呼包鄂地区植被覆盖度有浮动，2009~2013年呼包鄂地区植被覆盖度有改善趋势。呼包鄂地区植被覆盖度有整体退化、局部改善的现象，因此对于生态环境必须多加治理才能趋于良好。 Taking the Hohhot-Baotou-Ordos district as the study area, with the data source—MYD13Q1 products as a result of 16-day maximum synthesis method of MODIS NDVI data, with the help of ENVI and ArcGIS platform, this paper studied the vegetation coverage in this district in 10 years. At first, we made the calculation of vegetation coverage in 2003, 2005, 2007, 2009, 2011 and 2013, then got the average value of vegetation coverage of 10 years, and finally analyzed the vegetation coverage transfer in 2003-2013, which concluded that the vegetation coverage in central region of the Hohhot-Baotou-Ordos district is higher, and the north and the south are low. In 2003-2009, the vegetation coverage of the Hohhot-Baotou-Ordos district was floating, and in 2009-2013, the vegetation coverage had an improved trend. The vegetation coverage in the Hohhot-Baotou-Ordos district has overall degradation and local improvement, so the ecological environment needs more management to get better.","PeriodicalId":171984,"journal":{"name":"Geographical Science Research","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131177772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"近30年晋西北地区土壤有机碳蓄积量变化研究 The Study on the Change of Soil Carbon Reserves in Northwestern of Shanxi Province in Nearly 30 Years","authors":"史静, 海春兴, 高文邦, 姜洪涛","doi":"10.12677/GSER.2017.63022","DOIUrl":"https://doi.org/10.12677/GSER.2017.63022","url":null,"abstract":"研究晋西北地区的土壤有机碳对认识农牧交错带的土壤有机碳储量及其分布特征、土壤碳固存潜力、生态恢复的环境效应、调节区域气候，缓解全球变暖具有重要的科学意义。本文基于全国第二次土壤普查数据、2013年遥感影像数据，采用土壤类型法估算晋西北各土壤类型的平均土壤有机碳密度；并结合IPCC计算方法和土地利用转化法对比不同类型土壤有机碳蓄积量的变化。研究发现：1) 晋西北地区土壤平均有机碳密度为8.6 kg/m2；2) 不同土地利用类型土壤有机碳密度为：林地(11.89 kg/m2) > 草地(8.16 kg/m2) > 耕地(6.09 kg/m2) > 其他用地(5.50 kg/m2)；3) 林地、草地和耕地面积占总面积的比重由98.34%减少到了94.30%，但三种地类的土壤碳储量由2683.18•105t，增加到了2013年的2883.27•105t (IPCC算法)和2883.14•105t (土地利用转化法)。由此可知，晋西北地区生态恢复工程的实施增强了土壤的固碳能力。 Study of the northwestern of Shanxi area to recognize patterns in soil organic carbon reserves and its distribution characteristics of soil organic carbon, soil carbon sequestration potential, the en-vironmental effects of ecological restoration, and regulating regional climate, alleviating global warming has important scientific significance. This article was based on the second soil census data and remote sensing image data in 2013. The article estimated average soil organic carbon density of each soil type using soil type method, and soil carbon reserves changes of woodland, grassland and farmland using the IPCC calculation and land use conversion method. The results showed that the average soil organic carbon density is 8.6 kg/m2 in northwestern of Shanxi, soil organic carbon density of different land use types are woodland (11.89 kg/m2) > grassland (8.16 kg/m2) > farmland > (6.09 kg/m2) > other lands (5.50 kg/m2), and the area of woodland, grassland, and farmland is reduced from 98.34% to 94.30% of total area while the soil carbon reserves of them from 2683.18 × 105 t to 2883.27 × 105 t (the IPCC calculation method) or 2883.14 × 105 t (the land use conversion method). It can be seen that the ability of soil carbon sequestration has enhanced by applying the ecological environment restoration project in the northwestern of Shanxi.","PeriodicalId":171984,"journal":{"name":"Geographical Science Research","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126468164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"基于卫星遥感数据的肇庆新区土地动态监测及驱动力分析 Dynamic Monitoring and Driving Forces of Land in Zhaoqing New District Based on Satellite Remote Sensing Data","authors":"王冬军, 成功, 孙宝德, 骆漠舟","doi":"10.12677/GSER.2017.63015","DOIUrl":"https://doi.org/10.12677/GSER.2017.63015","url":null,"abstract":"肇庆新区是肇庆市东北部的一个新开发区，近30年来，该区域土地利用情况发生了很大的变化。作者以美国陆地卫星1990年、1995年、2000年、2005年、2010年和2015年的遥感影像为主要数据源，通过监督分类技术获得了各时相的主要地物分类专题图。在此基础上，统计地物面积，分析变化规律，探讨引起变化的主要原因。结果表明，20世纪90年代以来，肇庆新区绿地面积总体呈减少趋势，同时耕地和菜地面积也有所下降，这主要是因为城市建设用地的迅速增加占用了较多的土地；而水域出现了持续增加，主要是人们对水产品需求的增加导致的鱼塘的增加，它在一定程度上反映了当地经济正在快速发展，人们的饮食结构也在不断发生变化，不再满足仅仅依靠粮食维持温饱的生活状态。 Zhaoqing New District is a new development zone in the northeast of Zhaoqing City. In the past 30 years, the land use situation has changed greatly. The author uses the remote sensing image of Landsat satellite in 1990, 1995, 2000, 2005, 2010 and 2015 as the main data source, and obtains the main feature classification map of each phase by the technology of supervision classification. On this basis, the statistical area of land and analysis of changes in the law have been done to explore the main causes of change. The results show that since the 1990s, the green area of Zhaoqing New Area has been decreasing, and the areas of cultivated land and vegetable land have also decreased. This is mainly due to the rapid increase of urban construction land and the occupation of more land. The increase is mainly due to the increase in aquatic products caused by the increase in demand for aquatic products. It reflects to some extent that the local economy is developing rapidly and that people’s eating structure is constantly changing and no longer depends on food and food living condition.","PeriodicalId":171984,"journal":{"name":"Geographical Science Research","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123525759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"程海水质参数季节变化特征与空间异质性 Seasonal Variation and Spatial Heterogeneity of Water Quality Parameter in Chenghai","authors":"路志明, 张虎才, 常凤琴, 段立曾, 李华勇, 毕荣鑫, 吴汉, 赵帅营, 张扬","doi":"10.12677/GSER.2017.63018","DOIUrl":"https://doi.org/10.12677/GSER.2017.63018","url":null,"abstract":"本文以2015年10月、2016年3月、2016年5月和2016年7月对程海的四次垂直剖面实测数据为基础，通过分析探讨温度、叶绿素、pH值和溶解氧等参数的变化特征，发现冬春季程海处于混合期，水质稳定，但在夏秋季水温发生分层后，叶绿素含量和pH值随着温跃层的上下移动而发生明显变化，尤其是随温度升高，溶解氧分层位置高于温跃层，导致溶解氧含量极低的水体厚度增加，加剧了底层沉积物中的营养盐释放，造成水体富营养化加剧和蓝藻水华爆发，对水安全造成威胁。由于程海整个湖盆北深南浅并受风浪扰动影响，使得南部湖区全年表层水温均低于北部湖区，导致整个湖区水生植物量自北向南逐渐降低。程海南部湖区水质优于北部湖区，表现出了明显的空间异质性。建议加强水质监测、掌握其变化规律及影响因素，搞清营养物质成分来源及湖泊自循环过程，采取科学措施，防止水质持续恶化。 Based on the monitoring data of four vertical cross-section in October 2015, March 2016, May 2016 and July 2016, the variation characteristics of water quality parameters, which include tem-perature, chlorophyll-a, pH and dissolved oxygen (DO) in Lake Cheng or Chenghai were analyzed. The results indicated that the lake water was well mixed in the winter and spring; during the pe-riod the water quality is stable. But when the water temperature stratified in summer and autumn, the content of chlorophyll and the value of pH changed substantially along with the vertical movement of thermocline. Especially, with the temperature rising, the position of stratified DO layer became higher than thermocline, leading to a thickening of water body with low DO content. This process induced the release of nutrients from the lake sediments and promoted eutrophication and cyanobacteria blooming. Moreover, as Lake Cheng is deeper in north while shallower in south, together with stronger wind-wave disturbance in the south, the surface water temperature in south was lower than that in the north all the year round. This situation resulted in the amount of aquatic plant in the lake reduced from north to south gradually. The water quality in south lake is better than that in north, showing an obvious spatial heterogeneity. We recommend that the lake water quality monitoring should be strengthened in order to have a full understanding of the lake water quality and take measurements to prevent further deterioration of the lake water quality.","PeriodicalId":171984,"journal":{"name":"Geographical Science Research","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128401592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}