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基于地质环境质量分区评价的工程建设经济性对比分析研究——以广州市某规划核心区为例 被引量:2
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作者 容穗红 张庆华 《城市勘测》 2015年第3期169-172,共4页
选取广州市某规划核心区作为研究区,通过定性与定量方法相结合,开展地质环境质量分区评价,综合确定各规划分区工程建设适宜性和地质环境质量优劣,在此基础上,通过分析各规划分区的地基条件和施工条件,开展各类工程建设的经济性对比分析... 选取广州市某规划核心区作为研究区,通过定性与定量方法相结合,开展地质环境质量分区评价,综合确定各规划分区工程建设适宜性和地质环境质量优劣,在此基础上,通过分析各规划分区的地基条件和施工条件,开展各类工程建设的经济性对比分析和研究,如房屋建筑工程、市政工程、基坑工程等,根据各规划分区工程建设适宜性与经济性,合理调整规划布局,降低后期城市建设成本和风险。 展开更多
关键词 地质环境质量分区评价 工程建设适宜性 经济性对比分析
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山东省广饶县环境地质问题与地质环境区划浅析 被引量:1
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作者 梁凤英 罗斐 +2 位作者 张海林 梁文波 梁文继 《中国地质灾害与防治学报》 CSCD 2010年第2期110-113,共4页
本文简要论述了广饶县城区地质环境的主要特征,对咸水入侵、环境污染、地下水降落漏斗、地面沉降、地裂缝等主要环境地质问题的现状、产生和危害进行了阐述。选取地下水污染、地下水降落漏斗、海咸水入侵、地面沉降4种因子进行了质量评... 本文简要论述了广饶县城区地质环境的主要特征,对咸水入侵、环境污染、地下水降落漏斗、地面沉降、地裂缝等主要环境地质问题的现状、产生和危害进行了阐述。选取地下水污染、地下水降落漏斗、海咸水入侵、地面沉降4种因子进行了质量评价,进一步将研究区分为良好区、中等区和较差区。并根据区内存的主要环境地质问题及其发展趋势,提出相应的保护对策及建议。 展开更多
关键词 环境地质 质量评价 质量评价分区 保护区划 山东广饶县
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广西桂平市土壤中元素的有效态研究 被引量:4
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作者 韦世勇 《矿产与地质》 2017年第3期564-569,579,共7页
通过对桂平市1037个土壤样品的B、Co、Cu、Mn、Mo、P、Pb、Zn、N、S、pH和有机质分析。结果表明,土壤pH平均值为5.49,为酸性土壤,土壤中元素含量分布极不均匀,Pb、Mn、S、Mo元素有效量较高,而S、N、K2O等在该地区土壤环境中活性程度和... 通过对桂平市1037个土壤样品的B、Co、Cu、Mn、Mo、P、Pb、Zn、N、S、pH和有机质分析。结果表明,土壤pH平均值为5.49,为酸性土壤,土壤中元素含量分布极不均匀,Pb、Mn、S、Mo元素有效量较高,而S、N、K2O等在该地区土壤环境中活性程度和可被植物吸收利用的程度较低。微量元素在自然土中的有效度是最高的,在任何土壤中其有效度均受到不同程度的人为活动影响。部分元素全量是其有效量的重要影响控制因素,有机质增加有利于Mn、Cu等元素的活化,提高其生物有效量。多数元素有效度与pH值有关,土壤酸碱度对P、Mn、Pb、S的影响相对明显,土壤pH值和有机质对其他元素也有一定影响。 展开更多
关键词 土壤全量 有效态含量 有效度 土壤质量评价分区 桂平市
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Cultivated Land Quality Analysis of Karst Mountain Areas Based on GIS: A Case Study of Jingxi County 被引量:1
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作者 尹秋月 段正松 +1 位作者 李羡 陈兰康 《Agricultural Science & Technology》 CAS 2014年第8期1407-1409,1413,共4页
Agricultural land quality assessment of karst mountain areas is an impor-tant means to protect and manage cultivated land quality of karst mountain areas. With Jingxi County as a case, the data resources included achi... Agricultural land quality assessment of karst mountain areas is an impor-tant means to protect and manage cultivated land quality of karst mountain areas. With Jingxi County as a case, the data resources included achievements of cultivat-ed land grade, achievements of second land investigation, investigation of local con-ditions and the other data resources. With the overlay tool of MapGIS, attribute data of evaluation index were obtained, which can reflect agricultural land' characteris-tics, and agricultural land quality scores were calculated and land quality was grad-ed using the model of comprehensive evaluation of multiple factors to make further analysis on characteristics and spatial distribution. The results showed that used agricultural land is dominated by middle and high-grade lands in Jingxi County mainly, representing 68.58% of Jingxi County’s agricultural lands. On the other hand, the quality of paddy land is general y higher than that of dry land, and quality of agricultural land showed higher in middle and eastern Jingxi, and lower in north-western region, which provides references for national land management. 展开更多
关键词 GIS GIS Karst mountain areas Agricultural land Quality assessment Anal-ysis of characteristics
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Port Service Quality Study of Nigerian Sea Ports
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作者 Chinedum Onyemechi Azubuike Chibuzo Amanze +1 位作者 Chinemerem Igboanusi Abiodun Sule 《Journal of Shipping and Ocean Engineering》 2017年第2期59-64,共6页
This study is focused on service quality assessment in the Nigerian ports with Westem and Eastern port zones as study areas. It discovered the level of satisfaction derived by port users by evaluating expectations and... This study is focused on service quality assessment in the Nigerian ports with Westem and Eastern port zones as study areas. It discovered the level of satisfaction derived by port users by evaluating expectations and perceptions at the ports using some selected analysis tools to test raised hypothesis. This evaluation was based on the service quality model as developed by Parasuraman within the core dimensions of Empathy, Responsiveness, Tangibles, Reliability and Assurance. The attributes of expectations and perceptions raised within these dimensions were addressed with two hypotheses. H1 (Hypothesis one) and H2 (Hypothesis two) were addressed with the results of Factor Analysis which identified the significance port users attach to service quality dimensions and their respective attributes. 展开更多
关键词 Service quality PORT EXPECTATION perception.
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