日照市土地利用总体规划实施影响因素及修编建议     

贺兆成  丁伟  辛怡萱 《山东国土资源》2010,26(7):33-35

土地利用总体规划是城乡建设、土地管理的纲领性文件,是落实土地用途管制制度的重要依据。该文结合日照市土地利用总体规划实施过程中存在的问题,从经济、技术和政策等方面简述了影响规划实施的因素,并对土地利用总体规划修编工作提出了工作建议。  相似文献   

潍坊市加快“转方式调结构”的几点做法     

刘树亮 《山东国土资源》2010,26(12)

潍坊市国土资源局在开展加快"转方式、调结构"工作中,紧紧围绕市委、市政府的决策部署,以土地"稳增长"为工作中心,把节约集约用地作为工作重点,构建监管长效机制,以实际行动为"转方式、调结构"发展大局服务,取得了较好的社会效益和经济效益,成绩斐然。  相似文献   

松嫩沙地沙漠化及防治研究——以杜尔伯特蒙古族自治县他拉哈镇为例     

裘善文  王其存  陈国双  朱金花  宋风斌  张廷文 《中国沙漠》2011,31(2):331-338

杜尔伯特蒙古族自治县是松嫩沙地沙漠化面积最大的县,他拉哈镇是该县沙漠化比较有代表性的地区。土地沙漠化分布在全镇各村屯,面积为109.91 km2,占全镇土地总面积22.95%,主要为轻度和中度沙漠化类型。在沙地的沙丘中普遍发育1~2层古土壤层,经14C测年为(4 197±383)a BP～(7 463±143)a BP。经孢粉分析,草本植物花粉较多,乔、灌木植物花粉较少,古土壤层属全新世大暖期时期形成。沙地沙漠化的成因,既有自然因素又有人为原因。对中度沙漠化土地（包括沙丘地）一般采取疏林、灌、草治理模式;对轻度沙漠化土地（含沙平地）采取林、果、药（草）、杂（小杂粮）治理模式。  相似文献   

Surface soil moisture retrievals from remote sensing: Current status,products & future trends     

《Physics and Chemistry of the Earth》2015

Advances in Earth Observation (EO) technology, particularly over the last two decades, have shown that soil moisture content (SMC) can be measured to some degree or other by all regions of the electromagnetic spectrum, and a variety of techniques have been proposed to facilitate this purpose.In this review we provide a synthesis of the efforts made during the last 20 years or so towards the estimation of surface SMC exploiting EO imagery, with a particular emphasis on retrievals from microwave sensors. Rather than replicating previous overview works, we provide a comprehensive and critical exploration of all the major approaches employed for retrieving SMC in a range of different global ecosystems. In this framework, we consider the newest techniques developed within optical and thermal infrared remote sensing, active and passive microwave domains, as well as assimilation or synergistic approaches. Future trends and prospects of EO for the accurate determination of SMC from space are subject to key challenges, some of which are identified and discussed within.It is evident from this review that there is potential for more accurate estimation of SMC exploiting EO technology, particularly so, by exploring the use of synergistic approaches between a variety of EO instruments. Given the importance of SMC in Earth’s land surface interactions and to a large range of applications, one can appreciate that its accurate estimation is critical in addressing key scientific and practical challenges in today’s world such as food security, sustainable planning and management of water resources. The launch of new, more sophisticated satellites strengthens the development of innovative research approaches and scientific inventions that will result in a range of pioneering and ground-breaking advancements in the retrievals of soil moisture from space.  相似文献   

Reviews on land use change induced effects on regional hydrological ecosystem services for integrated water resources management     

《Physics and Chemistry of the Earth》2015

This paper proposed to provide valuable information for integrated water resources management through evaluating the research on the interaction mechanism among land use changes, regional hydrological ecosystem services and human well-being. Firstly, the driving mechanism of land use and land cover changes was introduced in this paper. Secondly, the overview of the interaction mechanism among land use and land cover changes, regional hydrological ecosystem services and human well-being was given. Based on the meta-analysis, land use changes have a profound influence on regional hydrological ecosystem services, and the variation of hydrological ecosystem could benefit or impair human well-being. Finally, two suggestions were emphasized for managers or policy makers for the future integrated water resources management: (1) Proper land use makes for the water resource management; (2) Blindly pursuing the provisioning services weakens other services of hydrological ecosystem.  相似文献   

Geological risk assessment for the rapid development area of the Erhai Basin     

《Physics and Chemistry of the Earth》2015

For low-slope hilly land development to have more new land space in a watershed, it is particularly important that to coordinate the sharply increasing conflicts between mountainous and urban land utilization in the city. However, development of low-slope hilly land easily induce potential risks of geologic hazards such as landslide and landslip. It may lead to further environmental losses in a watershed. Hence, it is necessary to study potential risks of geo-hazards in low-slope hilly land development in urban area. Based on GIS spatial analysis technique, we select a study area, Dali City in the Erhai Basin located in watershed belt of Jinsha River, Lancang River and Red River in Yunnan Province of China. Through studying some relevant key indexes and parameters for monitoring potential risks of geo-hazards, we establish a composite index model for zoning the area with potential risks of geo-hazards in development of low-slope hilly land in the study area. Our research findings indicate that the potential risks of geo-hazards in eastern Dali City is relatively low while of that on slow hills with gentle slopes in the western area are relatively high. By using a zoning research method, generated maps show geological information of potential risks of geo-hazards on low-slope hilly land which provide important messages for guarding against natural geo-hazards and potential environmental losses in a watershed.  相似文献   

Recursive cross-entropy downscaling model for spatially explicit future land uses: A case study of the Heihe River Basin     

《Physics and Chemistry of the Earth》2015

Downscaling methods assist decision makers in coping with the uncertainty regarding sustainable local area developments. In particular, they allow investigating local heterogeneities regarding water, food, energy, and environment consistently with global, national, and sub-national drivers and trends. In this paper, we develop a conceptual framework that integrates a partial equilibrium Global Biosphere Management Model (GLOBIOM) with a dynamic cross-entropy downscaling model to derive spatially explicit projections of land uses at 1-km spatial resolution from 2010 to 2050 relying on aggregate land demand projections. The fusion of the two models is applied in a case study in Heihe River Basin to analyze the extent of potential cropland, grassland, and unused land transformations, which may exacerbate already extensive water consumption caused by rapid expansion of irrigated agriculture in the case study region. The outcomes are illustrated for two Shared Socioeconomic Pathway scenarios. The kappa coefficients show that the downscaling results are in agreement with the land use and land cover map of the Heihe River Basin, which indicates that the proposed approach produces realistic local land use projections. The downscaling results show that under both SSP scenarios the cropland area is expected to increase from 2010 to 2050, while the grassland area is projected to increase sharply from 2010 to 2030 and then gradually come to a standstill after 2030. The results can be used as an input for planning sustainable land and water management in the study area, and the conceptual framework provides a general approach to creating high-resolution land-use datasets.  相似文献   

科尔沁沙地沙丘-草甸相间地区1986-2013年湖泊演变   总被引：1，自引：1，他引：0  

贾恪  刘廷玺  雷慧闽  段利民  罗艳云  张圣微  童新  孙丽 《中国沙漠》2015,35(3):783-791

湖泊变化敏感地记录着气候变化的信息。以科尔沁沙地沙丘-草甸相间地区为研究区,利用多时相TM/ETM+遥感影像,基于遥感和GIS技术提取研究区1986-2013年湖泊个数与面积信息,分析其变化规律及空间分异特征。在此基础上,联系降水量、蒸发量等气候要素和以人类活动影响为主的时间因子t,采用多元统计分析方法对研究区湖泊面积进行了模拟分析。结果表明:(1)研究区小型湖泊近30年间面积和个数均发生了不同程度的变化,其变化趋势与降水量呈现很强的正相关,与蒸发量呈较强的负相关,人类活动对小型湖泊面积的影响不太显著,随着时间的推移,研究区湖泊面积趋于萎缩,这种萎缩主要归因于气候的干化;(2)研究区t年湖泊面积A_t与前一年湖泊面积A_t-1、t年降水量P_t和蒸发量E_t存在较强的相关关系;(3)1986-2013年研究区典型湖泊--王巴哈嘎湖泊总体上呈萎缩状态,但不同方向上既有萎缩也有扩张,Ⅰ、Ⅱ、Ⅴ、Ⅵ区域(以北向为0°,顺时针每45°一个区域,并顺序标记为Ⅰ~Ⅷ区域)萎缩,其他区域扩张,其中以Ⅱ、Ⅲ、Ⅷ、Ⅳ区域为主导变异方向,Ⅵ方向次之,其他方向变化缓滞。研究成果不仅为科尔沁沙地生态系统的健康维持提供技术支撑,对其他同类地区湖泊环境的研究也具有指导作用。  相似文献   

毛乌素沙地现代人为活动的生态环境效应研究进展   总被引：1，自引：1，他引：0  

李娜  颜长珍 《中国沙漠》2015,35(2):487-492

毛乌素沙地地处中国北方农牧交错带,是典型的生态环境脆弱区。随着农牧业的发展、能源开发以及区域政策措施的实施等人为活动的增强,该地区生态环境发生了显著变化,人为活动产生了相应的生态环境效应。本文通过梳理国内外对毛乌素沙地生态环境效应的研究进展,从土地沙漠化、土地利用/覆被变化、植被演变3个方面系统总结了该地区的人为活动(重点关注人口变化、自然资源开发及重大环境工程的实施)对生态环境产生的正效应和负效应,并总结了该区域有关人为活动的生态环境效应评价的研究成果及存在的问题等。这可为进一步在该区域开展环境保护的实践与研究工作提供参考。  相似文献   

毛乌素沙地丘间低地主要植物叶片性状及其相互关系   总被引：1，自引：0，他引：1  

朱媛君  杨劼  万俊华  张璞进  牛明丽  赵利清  清华 《中国沙漠》2015,35(6):1496-1504

以毛乌素沙地丘间低地30种主要植物为研究对象,比较不同功能群植物叶片性状的变异特征,分析植物叶片各性状之间的关系。结果表明:30种植物的比叶面积的变异系数最大,比叶面积与叶片干物质含量呈现极显著的负相关关系,叶片干物质含量与叶片碳含量呈显著的正相关关系,叶氮含量与叶片碳氮比呈极显著负相关关系,叶面积与其他所有的叶片性状都无相关性。比叶面积、叶片干物质含量、叶面积、叶氮含量和叶碳含量在不同功能群之间存在显著差异,叶片碳氮比在不同功能群之间没有显著差异。研究结果有助于了解毛乌素沙地丘间低地环境变化对植物种群的作用,增进对丘间低地植被演变特征的认识。  相似文献