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人口增长
    (3) The economic development, population growth and policy are the dominant macro-driving factors in decrease of cultivated land area in Yantai. The obvious break during the change process of arable-land is related to the national macro-policies. The rapid decrease of cultivated land area coincided in time with the overheated economic growth resulting from the direct investment in fixed assets.
    (3)经济发展、人口增长和政策是耕地面积变化的主要宏观驱动因子,耕地数量变化过程中的明显突变与国家宏观政策背景相关联,耕地快速减少在发生时间上与经济的过热增长基本同步,在空间分布上与地区经济发展速度和水平的差异相一致;
    Along with continuing population growth and speedy economy development, the conflict between water-land supply and demand are increasingly serious, and environmental problems are more and more severe. Allocation situation of water-land resources not only decides the development of society and economy but also affects the renewing and reconstruction of eco-environment.
    随着人口增长和经济的快速发展,水土资源的供需矛盾日益尖锐,诸多生态环境问题也不断加剧,水土资源配置合理与否,不仅关系到社会经济的发展,而且影响着生态环境恢复与重建的进程。
    Together with other indexes, the average variation of arable land per year and the net decrease in arable land per capita of Putian County(1990~2000) are analyzed spatially and temporally. The discrepancy of economy development and population growth results in the regional differences including the serious loss in arable land in the central Xinghua Plain, the slower loss in southern coastal area and the slowest loss in northern mountainous area.
    根据1990~2000年莆田县各乡镇的耕地年均变化率,人均耕地净减量等指标对其耕地资源作时间上和空间上的分析,由于社会经济发展和人口增长的差异导致研究区中部兴化平原耕地资源流失严重,南部沿海地区耕地资源流失缓慢,而北部山区耕地资源流失最慢的区域差异。
    The RCER analysis also indicates that population growth and rapid economic development of Northwest China has eroded its resource base greatly and made resource exploitation state into a completely strained stage, the pressure between man and land has increased three times in the past 50 years and most of them have been brought about from economic development.
    长期的人口增长和经济社会发展已经使西北区目前人地关系协调状态进入了一个全面紧张的阶段,人地压力较50年代初增长了3倍。
    Analysis indicates that major problem in this area is of conflict among the limited water resources, population growth, social economic development.
    分析表明:当前突出的问题是有限的水资源与人口增长、社会经济发展和生态环境建设对水资源需求的矛盾。
    Build the saving type society and is developed harmoniously by coordinator and nature, deal with the relationship between economic construction , population growth and utilization of resources , ecological environmental protection, promote the whole society to go on production developing , life is rich , the high-efficient use of resource , ecological civilization development path with good environment.
    建设节约型社会就是统筹人与自然和谐发展,处理好经济建设、人口增长与资源利用、生态环境保护的关系,推动整个社会走上生产发展、生活富裕、资源高效利用、生态环境良好的文明发展道路。
    In order to realize the sustainable utilization of the cultivated land,some countermeasures are putted forward,for example,controlling population growth,making scientific urban development planning,setting up the early warning system of cultivated land,strengthening ecological enviroment construction,and so on.
    为了实现耕地的可持续利用,提出了控制人口增长,制定科学的城市发展规划,建立耕地预警制度,加强生态环境建设等措施.
    Owing to the construction of heavy industry,energy source and chemical foundation,population growth and development of economy and society,a lot of groundwater had exploited,and the spring water flow decreased,thus caused groundwater level dropped,and water quality polluted seriously.
    能源重化工基地建设、人口增长和经济发展,大量取水用水,使泉水出流量减少、地下水位下降、水质严重污染。
    (3) The sustainable development of the system between population and freshwater resources must be established on the basis of the ability that the sum of rate of the water resources self-renovation and recycled polluted water larger than the degree of water pollution and that population growth rate staying in a lower level,all of which required that the population and water pollution must be controlled and the water management,the resonable freshwater use must be strengthened effectively.
    (3)人口-淡水资源系统的可持续发展,必须建立在淡水资源自我更新与污水资源化比率之和大于水污染水平,且人口增长率保持在低水平的基础之上。 这要求人类严格控制人口增长、控制水污染,对有限的水资源加强管理、合理配置、高效利用和有效保护。
    Along with population growth and constant reduction of petroleum resources,Daqing city strengthens the intensity of utilization of resources of cultivated land,which causes tile ecological environment to be destroyed,cultivated land quality obviously to drop,how to coordinate mid develop the relation with resource,have already become one of the outstanding problems demanding urgently solution in tile course of sustainable development strategy of this city.
    随着人口增长和石油资源的不断减少,大庆市对耕地资源利用强度加大,导致生态环境遭到破坏,耕地质量明显下降,如何协调好发展与资源的关系,已成为该市在可持续发展战略过程中亟待解决的突出问题之一.
    In order to put forward the effective safeguard of tilth protection, this paper think of economic development、 population growth and faultiness of land market order as restrictive factors of ,tilth and farmland protection in Jiangbei District after analyzing tilth and farmland quantitively and qualitatively changes from 1997 to 2004.Base on these analysis, this paper put forward perfect political measures of tilth protection.
    为了提出较为有效的耕地保护措施,本文从数量、质量上在分析了1997-2004年重庆市江北区耕地与基本农田变化概况后,认为经济发展、人口增长、土地市场秩序的不完善是制约江北区耕地及基本农田保护的因素,在此基础上,提出完善耕地保护政策的思路
 

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