我国碳酸盐岩储层CO2地质储存潜力与适宜性     

王敬霞  雷磊  于青春 《中国岩溶》2015,34(2):101-108

文章系统收集并分析了我国各盆地地层、大地构造、油田地质、水文地质数据,研究了我国各盆地碳酸盐岩地层空间分布和孔隙度特性,做出了《全国盆地碳酸盐岩分布面积分级图》、《全国盆地碳酸盐岩厚度分级图》、《全国盆地碳酸盐岩孔隙度分级图》、《全国盆地碳酸盐岩二氧化碳地质储存潜力分级图》。逐一对全国各沉积盆地内800～5 000 m深度区间各地质时代形成的碳酸盐岩储层的CO2储存能力进行了计算。通过层次分析法确定各评价指标权重,制做出全国盆地E级碳酸盐岩储层CO2地质储存适宜性评价结果表,绘制出《全国盆地碳酸盐岩储层CO2储存适应性评价图》。对全国盆地CO2储存进行了适宜性评价,剔除了不适宜CO2地质储存的沉积盆地,选出适宜的沉积盆地以供下一阶段继续研究。   相似文献   

Exploring the dynamics of agricultural climatic resource utilization of spring maize over the past 50 years in Northeast China     

《Physics and Chemistry of the Earth》2015

Exploring the dynamics of the utilization of agricultural climatic resources (i.e., environmental factors that affect crop productivity such as light, temperature, and water) can provide a theoretical basis for modifying agricultural practices and distributions of agricultural production in the future. Northeast China is one of the major agricultural production areas in China and also an obvious region of climatic warming. We were motivated to analyze the utilization dynamics of agricultural climatic resource during spring maize cultivation from 1961 to 2010 in Northeast China. To understand these dynamics, we used the daily data from 101 meteorological stations in Northeast China between 1961 and 2010. The demands on agricultural climatic resources in Northeast China imposed by the cultivation of spring maize were combined and agricultural climatic suitability theory was applied. The growth period of spring maize was further detailedly divided into four stages: germination to emergence, emergence to jointing, jointing to tasseling, and tasseling to maturity. The average resource utilization index was established to evaluate the effects. Over the past five decades, Northeast China experienced increases in daily average temperature of 0.246 °C every decade during the growing season (May–September). At the same time, strong fluctuating decreases were observed in average total precipitation of 8.936 mm every decade and an average sunshine hour of 0.122 h every decade. Significant temporal and spatial changes occurred in K from 1961 to 2010. The K showed decreasing trends in Liaoning province and increasing trends in Jilin and especially in Heilongjiang province, which increased by 0.11. Spatial differences were visible in different periods, and the most obvious increase was found in the period 2001–2010. The areas with high values of K shifted northeastward over the past 50 years, indicating more efficient use of agricultural climatic resources in Northeast China.  相似文献   

基于分县尺度的中国人口分布适宜度研究   总被引：10，自引：4，他引：6  

封志明  杨艳昭  游珍  张景华 《地理学报》2014,69(6):723-737

以人口空间分布及其与资源环境和社会经济协调性评价为核心,提出了一整套人口与资源环境和经济社会发展协调水平评价的指标体系与模型方法;以分县为基本单元,定量评价了2010 年中国人口与资源环境和社会经济发展的协调性和协调程度;根据人口分布适宜度高低和限制性差别,划分了中国分县人口分布适宜等级和限制类型,定量揭示了中国不同地区人口与资源环境和社会经济协调发展的时空格局和地域特征。研究表明：① 2010 年中国有3/5 以上的县（市、区） 人口分布与人居环境基本适宜,中国分县人口分布与人居环境自然适宜性保持了高度一致性;② 2010 年中国有1/2 以上的县（市、区） 人口发展基本不受水土资源约束,分县人口分布与水土资源适宜性处于中等水平;③ 2010 年中国有超3/5 的县（市、区） 人口与社会经济发展基本协调,人口分布的社会经济协调性良好;④ 2010 年中国近3/5 的县（市、区） 人口分布适宜度在60 以上,人口资源环境与发展处于基本协调或相对协调状态;⑤2010 年中国分县人口资源环境与发展的协调程度东部优于中部、中部优于西部;⑥ 2010 年中国分县人口分布适宜度可划分为人口资源环境与发展基本协调、相对协调、有待协调和亟待协调4个适宜等级与10 个限制类型。  相似文献   

鲁南经济带地质环境脆弱性评价     

李元仲  赵书泉  武雄 《现代地质》2014,28(5):1096-1102

鲁南经济带内矿产资源及地下水资源非常丰富,长期大量开采引发的环境地质问题主要有采空塌陷、岩溶塌陷、地面沉降、地下水降落漏斗及海水入侵等。选取地形地貌、岩土体特征、水文地质条件、环境工程地质问题、地质资源和人类工程经济活动等17个评价因子,利用傅勒三角形法确定各评价因子的权重,采用专家聚类法评价地质环境脆弱性。选取重点城市所在评价单元的土壤环境质量(T)、工程地质环境(G)、地质灾害危险性(Z)和地质环境承载力(C)等4个评价因子,采用栅格叠图法对重点城市适宜性进行了评价。评价结果显示,全区可划分为地质环境脆弱性极高区、高区、中等区和低区共4个区,菏泽市、临沂市处于地质环境脆弱性高区,济宁市、枣庄市及日照市位于地质环境脆弱性中等区。地质环境适宜性综合评价显示5个重点城市均为基本适宜,其中枣庄市西城区为适宜。  相似文献   

地质灾害隐患应急避险场所适宜性初步评价     

丁桂伶  赵忠海  翟淑花  赵越 《中国地质灾害与防治学报》2014,25(4):97-100

地质灾害应急避险场所不仅在灾中或灾后能为灾民提供一个临时安置或生存场所,而且更是社会整合其有限资源开展防灾减灾工作的平台。本文结合北京市地质灾害应急避险现状及特征,提出了地质灾害隐患应急避险场所的概念、适宜性评价原则及标准。  相似文献   

东营市城区第四纪松散堆积物工程建筑适宜性评价     

张金兰 《山东国土资源》2010,26(7):17-20

从工程地质角度,以东营城区0～50m的土体为研究对象,分析了土体的工程地质特征,采用专家类聚法,对一般工业民用建筑和高层重型建筑物场地的工程建筑适宜性做出了评价并进行了区域划分,对东营城区将来的工程建设规划具有重要的指导意义。  相似文献   

Changes of citrus climate risk in subtropics of China     

DUAN Hailai  QIAN Huaisui  LI Mingxia  DU Yaodong 《地理学报》2010,20(6):818-832

Based on the citrus temperature, precipitation, sunlight and climate risk degree, the article divides subtropics of China into three types: the low risk region, the moderate risk region and the high risk region. The citrus temperature risk increases with increasing latitude (except for the western mountainous area of subtropics of China). The citrus precipitation risk in the central part of subtropics of China is higher than that in the northern and western parts. The distributions of citrus sunlight risk are not consistent to those of the citrus precipitation risk. The citrus climate risk is mainly influenced by temperature. There is latitudinal zonal law for the distribution of the climate risk, that is, the climate risk increases with increasing latitude. At the same time the climate risk in mountainous area is high and that in eastern plain area is low. There are differences in the temporal and spatial changes of the citrus climate. In recent 46 years, the citrus climate risk presents a gradual increasing trend in subtropics of China, especially it has been increasing fast since the 1980s. Because of the global warming, the low risk region in the eastern and southern parts has a gradual decreasing trend, however, the high risk region in the northern and western parts has an increasing trend and the high risk region has been extending eastward and southward. The article analyses the distribution of the citrus climate risk degree of reduction rates of >10%, >20% and >30% in subtropics of China, and studies their changes in different time periods. Results show that the risk is increasing from southeast to northwest.  相似文献   

基于人居环境适宜性的市域人口增长调控分区研究──以南京市为例   总被引：4，自引：0，他引：4  

段学军  田方 《地理科学》2010,30(1):45-52

构建人口规模收益函数和外部成本函数,对南京市主城、郊区和县城进行最优人口规模分析;进而通过人口随机分配模型和基于人居环境适宜性评价的优化目标函数,以预测的总人口规模和圈层人口最优规模为约束条件,采用蒙特卡洛法进行求解,获得人口的优化分布结果,与现状人口分布相比,把南京市域空间划分为四类人口发展功能区。研究认为,商业街区和老街区如湖南路、新街口街道、洪武路街道、朝天宫街道等老街区人口密度过高,需要进行人口规模的控制或调减;处于郊区的东山镇、沿江街道、仙林街道等,人居适宜性相对较高,现状人口密度较低,应快速集聚人口;南北两翼以及生态保护区的生态敏感性高,需要削减人口。  相似文献   

模糊综合评判在土地适宜性评价中应用研究   总被引：5，自引：0，他引：5  

刘耀林  刘艳芳  夏早发 《武汉大学学报(信息科学版)》1995,(1)

在十堰市土地利用现状调查的基础上，针对现有坡荒地，通过对制约土地的自然因素和社会经济条件的综合分析，依照土地质量满足对预定用途要求的程度，采用模糊数学的方法，在计算机上完成了坡荒地的宜农、宜林、宜牧、宜园４个适宜类的评价；同时对宜农地进行了更进一步的讨论。  相似文献   

西藏康马县涅如藏布河谷种植业结构的优化模式   总被引：5，自引：0，他引：5  

刘刚才  王小丹  胡先才  米玛洛卓  刘淑珍 《山地学报》2004,22(1):54-58

种植业结构调整是农村产业结构调整和增加农民收入的基本途径之一。通过对西藏康马县涅如藏布河谷区的实地踏勘和采样分析,该区种植业结构较单一(绝大部分是种植粮食),且效益较差。应用线性规划的原理,对该区种植业结构进行了分析,在满足该区粮食需求的情况下,目前耕地的27％可以用于种植牧草,种植业效益可以提高9倍。  相似文献