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Residents'Satisfaction with Public Services in Mountainous Areas:An Empirical Study of Southwestern Sichuan Province,China 被引量:4
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作者 SONG Xueqian DENG Wei +2 位作者 LIU Ying ZHAO Chen WAN Jiangjun 《Chinese Geographical Science》 SCIE CSCD 2017年第2期311-324,共14页
Abstract: Enhancing the efficiency of public services is essential to residents in mountainous areas. It is also important to promote sus- tainable development of these regions. Analysing residents' satisfaction wit... Abstract: Enhancing the efficiency of public services is essential to residents in mountainous areas. It is also important to promote sus- tainable development of these regions. Analysing residents' satisfaction with public services in mountainous areas can help in evaluating outcomes of fiscal investment and identifying potential coping approaches for improving public service efficiencies. The residents' satisfaction with public services and the factors that influence such satisfaction were examined in this study. A study of 12 towns located in the southwestern Sichuan Province was performed using an entropy-weighted analytic hierarchy process (EWAHP), the technique for order preference by similarity to ideal solution (TOPSIS) and Tobit regression methods. The results indicate that: 1) the spatial distribu- tion of satisfaction with public services is non-uniform, and the spatial distribution structure varies for different types of public services. 2) Residents' satisfaction with public services is influenced by both objective and subjective factors. Population density, economic dis- tance, social and cultural divisions and elevation are the major objective factors, whereas bounded rationality, the hierarchy of needs and service expectations are the main subjective factors. The most effective strategies for enhancing residents' satisfaction with public ser- vices are likely to be clustering the population, choosing supply centres with different public services, regulating the cultural division in ethnic minority towns, selecting supply priorities in accordance with residents' needs, implementing targeted intervention policies and establishing 'bottom-up' and 'top-down' integrated decision-making mechanisms. Keywords: mountainous areas; public services; residents' satisfaction; entropy-weighted analytic hierarchy process (EWAHP); technique for order preference by similarity to ideal solution (TOPSIS); Tobit regression; southwestern Sichuan Province 展开更多
关键词 mountainous areas public services residents' satisfaction entropy-weighted analytic hierarchy process (EWAHP) technique for order preference by similarity to ideal solution (TOPSIS) Tobit regression southwestern sichuan province
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Effects of Land Use Change on Eco-environment in Hilly Area of Central Sichuan Basin——A Case Study of Yanting County, Sichuan Province 被引量:2
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作者 Luo Huai-liang, Zhu Bo, Chen Guo-jie, Gao Mei-rongInstitute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China College of Resources and Environment, Sichuan Normal University, Chengdu 610066, Sichuan, China 《Wuhan University Journal of Natural Sciences》 CAS 2003年第03B期981-986,共6页
With the artificial alder and cypress mixed forest being planted, there has been a marked land use change since 1970s' in Hilly Area of Central Sichuan Basin, China. Data from meteorological observations or posts ... With the artificial alder and cypress mixed forest being planted, there has been a marked land use change since 1970s' in Hilly Area of Central Sichuan Basin, China. Data from meteorological observations or posts operated over long time, measurement and calculation of NPP (net primary production) and biomass of biological community, and analysis of soil organic matter content show that the artificial alder and cypress mixed forest has outstanding eco-environmental effect: adjusting local climate, raising soil fertility, alleviating menace of drought, and raising NPP and biomass of biological community. It is very beneficial for improving ecological environment to afforest artificial alder and cypress mixed forest in populous Hilly Area of Central Sichuan Basin, China. Key Words: land use/land cover change (LUCC); eco-environmental effect; Hilly Area of Central Sichuan Basin; the artificial alder and cypress mixed forest 展开更多
关键词 of as for sichuan province Effects of Land Use Change on Eco-environment in Hilly area of Central sichuan Basin A Case Study of Yanting County on ECO
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A Survey of Social Nutrition Status of the Elderly in theUrban Area of Chengdu, Sichuan Province 被引量:3
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作者 HUANG CHENG-YU WANG RUI-SHU +2 位作者 GU HUA-QIANG CHEN HAI AND YUAN HONG-JIANG (CMB on Gerontology, West China University of the ical Sciences,Chengdu 610041, China) 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 1998年第3期277-285,共9页
The social nutrition status was investigated among 246 subjects aged 60-90 living at three urban communities in Chengdu of Sichuan Province. The questionnaire was designed to evaluate socirydeweraphic background, the ... The social nutrition status was investigated among 246 subjects aged 60-90 living at three urban communities in Chengdu of Sichuan Province. The questionnaire was designed to evaluate socirydeweraphic background, the subjects' nutrition knowledge, and the support systerns for geriatric nutrition. Fasting venous blcod was colected for the analysis of biochemical parameters. Blood pressure, bene mineral contents (BMC), body weight (BW) and they height (BH) were measured at the same time. Only 49. 7% of the subjects correctly an swered four basic questions on nutrition. Food patterns for the elder1y were simple and modest. Several nutrition-related disorders for the elderly were including high systolic bbo pressure (44. 6 % ), hyPertriglyceridemia (25. 9 % ), high diasto1ic blood pressure (25. 1% ),obesity (24. 5% ), high PBG (20. 6% ), emaciation (19. 9%), high FBG (17.9%) and osteoporosis (16. 8%). These data indicate that the support systems for the geriatric nutrition will have to be improved. 展开更多
关键词 A Survey of Social Nutrition Status of the Elderly in theUrban area of Chengdu sichuan province PBG
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Factor Analysis on the Factors that Influencing Rural Environmental Pollution in the Hilly Area of Sichuan Province,China 被引量:13
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作者 LING Jing1,2,DENG Liang-ji1,2 1.School of Resource and Environment,Sichuan Agricultural University,Ya’an 625014,China 2.Key Laboratory of Land Information in Sichuan Province,Ya’an 625014,China 《Asian Agricultural Research》 2011年第2期69-72,共4页
By using factor analysis method and establishing analysis indicator system from four aspects including crop production,poultry farming,rural life and township enterprises,the difference,features,and types of factors i... By using factor analysis method and establishing analysis indicator system from four aspects including crop production,poultry farming,rural life and township enterprises,the difference,features,and types of factors influencing the rural environmental pollution in the hilly area in Sichuan Province,China.Results prove that the major factor influencing rural environmental pollution in the study area is livestock and poultry breeding,flowed by crop planting,rural life,and township enterprises.Hence future pollution prevention and control should set about from livestock and poultry breeding.Meanwhile,attention should be paid to the prevention and control of rural environmental pollution caused by rural life and township enterprise production. 展开更多
关键词 RURAL area ENVIRONMENTAL POLLUTION Influencing fac
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The Quantitative Analysis of Land Use Structure Characteristics of County in Mountainous Areas in Sichuan Province of China——A Case Study of Rong County 被引量:6
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作者 ZHOU Wei1,2,WANG Chen1,2,SONG Xing1,2,DENG Liang-ji1,2 1.College of Resource and Environment,Sichuan Agricultural University,Ya’an 625014,China 2.Key Laboratory of Land Information in Sichuan Province,Ya’an 625014,China 《Asian Agricultural Research》 2011年第5期28-33,共6页
Based on the data concerning detailed survey on land in the year 2009 and land change in the year 2010 in Rong County,a mountainous region of Sichuan Province,by using quantitative geographical model,we conduct quanti... Based on the data concerning detailed survey on land in the year 2009 and land change in the year 2010 in Rong County,a mountainous region of Sichuan Province,by using quantitative geographical model,we conduct quantitative analysis of the status quo of land use in Rong County in terms of land use diversification,land use centralization,land use combination type,land use geographic significance and comprehensive use degree of land use.The results show some characteristics as follows.Firstly,land use in study area displays prominent characteristic of diversification;there is a high degree of completeness land use type;there is a great similarity among towns.Secondly,there is limited combination number of land use type;mostly the combination number of the towns is 2-3;the holistic function of regional land is fragile;the proportion of farmland areas is big,reaching 40.09%;the land use type of 21 towns is farmland.Thirdly,the towns with prominent characteristic of diversification of land use in Rong County,have low degree of centralization of land use and relatively big combination number of land use type,and vice versa.Fourthly,the type and quantity of agricultural land resources with geographical significance are relatively complete with nothing missing;it abounds in untapped land,but the overall index values of land use are all smaller than 300,with low overall use degree of land. 展开更多
关键词 LAND USE Quantity structure QUANTITATIVE analysis
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Study on Rural Poverty in Ecologically Fragile Areas——A Case Study of the Tibetan Areas in Sichuan Province
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作者 LAN Hong-xing Sichuan Agricultural University, Ya’an 625014, China 《Asian Agricultural Research》 2012年第1期27-31,61,共6页
This article offers an overview of natural environment, economic development, and social development in the Tibetan areas in Sichuan Province. The major manifestations of the status quo of poverty in the Tibetan areas... This article offers an overview of natural environment, economic development, and social development in the Tibetan areas in Sichuan Province. The major manifestations of the status quo of poverty in the Tibetan areas are as follows: there is a wide range of poverty and a large poor population; the poverty degree is high and it is difficult to alleviate poverty; the natural disasters are frequent and the phenomenon of poverty arising from disasters is serious. We analyze the factors responsible for poverty of farmers and herdsmen in Sichuan Province as follows: first, the natural conditions are inclement and the ecological environment is fragile; second, the social attitudes are stale and the religious influence is deep; third, the development of education lags behind, the human capital inputs are short and the self-development capacity is weak; fourth, the state poverty alleviation and development policy is weakly directed at region; fifth, the Tibetan areas are facing the dilemma of choosing resources endowments or ecological protection. Following proposals are put forward to resolve the poverty issue in the Tibetan areas of Sichuan Province: strengthen infrastructure construction, and underpin self-development capacity of the Tibetan areas in Sichuan Province; reinforce organic connection of social security and poverty alleviation and development, and promote self-development capacity of impoverished farmers and herdsmen in the Tibetan areas; strengthen policy support, and improve self-development policy and mechanism of the Tibetan areas in Sichuan Province; drive the popularization of technology and culture in the Tibetan areas, and update the development concept of farmers and herdsmen in the Tibetan areas; accelerate the development of competitive industries in Tibetan areas, and promote economic development capacity of the Tibetan areas. 展开更多
关键词 Ecologically fragile areas POVERTY ISSUE Self-deve
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Balance of Water Supply-demand in Paddy Fields in Hilly Regions in Sichuan Province
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作者 张鸿 姜心禄 +1 位作者 樊红柱 郑家国 《Agricultural Science & Technology》 CAS 2012年第7期1489-1492,共4页
[Objective] The aim was to study the effects of water supply and consumption on water saving and drought resistance. [Method] Controlling field experiment was conducted to explore water balance between supply and dema... [Objective] The aim was to study the effects of water supply and consumption on water saving and drought resistance. [Method] Controlling field experiment was conducted to explore water balance between supply and demand in paddy fields in hilly regions in Sichuan Province. [Result] Rainfall in hilly areas was 3 611.10 m3/hm2; water for irrigation was 6 299.25 m3/hm2; evapotranspiration of rice was 6 424.95 m3/hm2; deep leakage was 2 459.55 m3/hm2; overflowing amount was 1 026.00 m3/hm2. In addition, water consumption totaled 8 884.50 m3/hm2 during rice production; water use was 0.99 kg/m3 and use efficiency of irrigated water was 1.40 kg/m3. [Conclusion] Water supply and consumption should be further organized to save water and fight against drought in hilly areas in Sichuan Province. 展开更多
关键词 RICE Water balance between supply and demand sichuan province Hilly areas
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四川甘洛铅锌矿集区闪锌矿Rb-Sr等时线年龄及其地质意义
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作者 魏宇 杨永峰 +7 位作者 柳维 王维华 张庆松 李金生 胡儒权 赵德坤 李俊俊 崔文东 《地质与勘探》 CAS CSCD 北大核心 2024年第3期482-493,共12页
四川甘洛铅锌矿集区位于扬子地块西南缘的川滇黔铅锌成矿带北段,是四川主要的铅锌产地,具有重要经济价值。为研究该矿集区铅锌成矿时代、成矿大地构造背景和成矿机制,以支撑区域找矿勘查,在区内选择赤普和尔呷地吉两个典型铅锌矿床开展... 四川甘洛铅锌矿集区位于扬子地块西南缘的川滇黔铅锌成矿带北段,是四川主要的铅锌产地,具有重要经济价值。为研究该矿集区铅锌成矿时代、成矿大地构造背景和成矿机制,以支撑区域找矿勘查,在区内选择赤普和尔呷地吉两个典型铅锌矿床开展闪锌矿Rb-Sr同位素体系研究,获得Rb-Sr等时线年龄246±17 Ma(MSWD=2.3),表明区内铅锌矿化作用发生于早三叠世,与古特提斯洋闭合时限吻合;闪锌矿(87Sr/86Sr)i值变化于0.71061~0.71393,高于幔源87Sr/86Sr值0.70355及峨眉山玄武岩87Sr/86Sr值0.704979~0.706938,低于基底岩石87Sr/86Sr值0.7243~0.7288,暗示成矿物质主要来源于地壳。综合前人研究,认为在古特提斯洋闭合背景下,强烈造山运动诱发盆地卤水深循环并萃取基底地层中的成矿物质,在峨眉山玄武岩岩浆活动的热动力条件下,含矿流体沿马拉哈断裂进一步迁移沉淀形成了赤普和尔呷地吉铅锌矿床。马拉哈深大断裂及造山作用派生的层间或断层破碎带、碳酸盐岩地层是甘洛地区主要的控矿要素。 展开更多
关键词 闪锌矿 RB-SR等时线年龄 成矿时代 物质来源 甘洛铅锌矿集区 四川
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地震易发区传统村落空间分布特征及灾害韧性评价 被引量:1
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作者 白惠文 师满江 +1 位作者 曹琦 宁志中 《自然灾害学报》 CSCD 北大核心 2024年第1期30-41,共12页
在全球气候变化背景下,我国地震易发区的传统村落正面临来自地震、气象和地质等多维灾害的侵扰。选择四川省地震易发区内179个传统村落为研究对象,围绕灾害韧性理论,从宏观、中观和微观3个尺度构建涵盖了社会、文化、环境、生态、建筑... 在全球气候变化背景下,我国地震易发区的传统村落正面临来自地震、气象和地质等多维灾害的侵扰。选择四川省地震易发区内179个传统村落为研究对象,围绕灾害韧性理论,从宏观、中观和微观3个尺度构建涵盖了社会、文化、环境、生态、建筑和区位6个维度的传统村落灾害韧性评价框架和指标体系,定量评价了研究区传统村落在不同空间分布下的灾害韧性水平。研究区内传统村落主要沿河(沟)谷地带分布,按地形特征,可分为高原山地区和平原丘陵地区传统村落,两者在地理区位、地形起伏度及集聚程度上皆表现出较大的差异;研究区传统村落灾害韧性整体偏低,且空间差异性显著。高原山地区约83.33%的传统村落处于低或较低的灾害韧性等级,仅在文化和建筑2个维度上的韧性水平高于平原丘陵地区,而平原丘陵地区传统村落在社会、环境、生态和区位4个维度上的韧性水平均高于高原山地区。研究构建了一套针对地震灾害易发区的传统村落灾害韧性评价指标体系,以期为提升传统村落综合防灾减灾能力提供参考。 展开更多
关键词 地震易发区 传统村落 空间分布 空间分析 灾害韧性 四川省
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基于S-CAD方法的四川省单元式乡村国土空间规划政策评价与优化研究 被引量:1
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作者 李建兴 陈锦富 +1 位作者 孙晓艳 许云富 《国土资源科技管理》 2024年第1期70-81,共12页
国土空间规划改革以来,各地开展了探索与实践,2021年四川在全省推行以片区为单元编制乡村国土空间规划,是全国第一个在全省范围开展单元式乡村国土空间规划的省域。通过运用S-CAD方法和政策工具分析法对其政策体系进行分析,并结合规划... 国土空间规划改革以来,各地开展了探索与实践,2021年四川在全省推行以片区为单元编制乡村国土空间规划,是全国第一个在全省范围开展单元式乡村国土空间规划的省域。通过运用S-CAD方法和政策工具分析法对其政策体系进行分析,并结合规划编制成果对政策进行综合评价,发现其存在以下不足:一是政策体系不完善,主要出台了规划编制相关政策,而在规划实施和监督方面缺乏专门政策;二是政策价值观和政策预期结果超出了政策目标和政策手段所能够实现的范围,政策元素之间具有不一致性;三是政策工具结构不平衡,在规划区域衔接、对上衔接等方面非常薄弱。因此,需要进一步完善政策体系、调适政策元素关系、优化政策工具结构。通过这一研究,以期为深化乡村国土空间规划探索提供借鉴。 展开更多
关键词 乡村国土空间规划 单元式规划 政策工具 S-CAD方法 四川省
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农业科技支撑巩固拓展脱贫攻坚成果同乡村振兴有效衔接研究——以四川民族地区为例
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作者 张雄 龚一耘 +5 位作者 周评平 陈沧桑 王军 吴海军 蒋馨 杨双羽 《西南农业学报》 CSCD 北大核心 2024年第6期1386-1392,共7页
巩固拓展脱贫攻坚成果同乡村振兴有效衔接是新时期“三农”工作最重要的任务之一,而农业科技对乡村产业振兴起着关键作用。四川民族地区普遍存在农业科技创新投入强度不够、现代农业基础薄弱、农业科技人才供给不足、农业科技创新机制... 巩固拓展脱贫攻坚成果同乡村振兴有效衔接是新时期“三农”工作最重要的任务之一,而农业科技对乡村产业振兴起着关键作用。四川民族地区普遍存在农业科技创新投入强度不够、现代农业基础薄弱、农业科技人才供给不足、农业科技创新机制不完善、农户科技文化素质相对偏低、内生动力不足等问题,建议从构建农业科技创新和成果转化同时发力的科技支撑体系,建设高能级科技成果示范转化平台提升科技供给水平,完善农业生产经营组织体系,完善农业信息化和机械化服务体系,建立农产品质量安全与标准化体系,强化农业科技人才培养体系六个方面入手,实现四川省少数民族地区巩固拓展脱贫攻坚成果同乡村全面振兴有力有效精准衔接。 展开更多
关键词 农业科技 民族地区 乡村振兴 脱贫攻坚 四川省
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气候韧性视角下基于NSGA-Ⅲ的国土空间优化方法
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作者 施雅蓉 庄子薛 +1 位作者 沈一 王倩娜 《风景园林》 北大核心 2024年第6期89-98,共10页
【目的】以增汇减排为核心的自然气候解决方案(natural climate solutions,NCS)是应对气候变化问题的有效方法之一,而城市经济社会快速发展使NCS落实的载体——林草地等生态用地面临着随时被侵占的困境。通过构建多目标优化模型完成国... 【目的】以增汇减排为核心的自然气候解决方案(natural climate solutions,NCS)是应对气候变化问题的有效方法之一,而城市经济社会快速发展使NCS落实的载体——林草地等生态用地面临着随时被侵占的困境。通过构建多目标优化模型完成国土空间优化,可协调多方发展需求并实现气候韧性。【方法】以四川天府新区眉山片区为例,以2030年为期设定强气候韧性、均衡发展两种情景,构建基于“双评价”约束的第三代非支配排序遗传算法(NSGA-Ⅲ)的国土空间优化模型。【结果】强气候韧性、均衡发展情景中分别有10.92%和13.21%的土地发生变化,推动气候调节效益分别增长23.12%、9.88%,前者情景中首要贡献者是林地,后者为草地;人口容量分别增长64.94%、69.15%,强气候韧性情景在实现气候韧性的同时兼顾了城市发展。两种情景结果都显示,研究区下辖的5个街道/镇中,生态用地较少的青龙街道内林地面积增长率超100%,城镇开发强度较小的高家镇、贵平镇内建设用地面积增长率超600%,锦江镇、视高街道内各类型土地变化相对平稳;与2020年相比,优化后的各类型土地斑块形状趋于复杂,国土空间呈现更加破碎的布局模式,尤以均衡发展情景为甚。【结论】多目标国土空间优化模型以气候韧性为主导,兼顾社会发展需求,减轻了生态用地易被侵占的风险,为研究区推进零碳排放试点工程和落实气候韧性发展实践提供可借鉴的技术路径。 展开更多
关键词 气候变化 风景园林 低碳 情景模拟 NSGA-Ⅲ 四川天府新区眉山片区
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四川新龙地区中酸性侵入岩年代学、地球化学及对甘孜-理塘洋演化过程的制约
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作者 严松涛 吴青松 +3 位作者 代雪健 李虎 辛重阳 朱利东 《地质通报》 CAS CSCD 北大核心 2024年第2期401-415,共15页
基于详细的野外调查,对四川新龙地区不同类型侵入岩进行了岩石学、地球化学和锆石U-Pb同位素测年,探讨其岩石成因及构造背景。研究表明,古隆巴花岗闪长岩和日果闪长岩同属准铝质系列,具有低硅碱、高铁镁特征,中等的稀土元素总量及明显... 基于详细的野外调查,对四川新龙地区不同类型侵入岩进行了岩石学、地球化学和锆石U-Pb同位素测年,探讨其岩石成因及构造背景。研究表明,古隆巴花岗闪长岩和日果闪长岩同属准铝质系列,具有低硅碱、高铁镁特征,中等的稀土元素总量及明显的Nb、Ta负异常,属于I型花岗岩,为俯冲期岩浆活动产物,获得日果闪长岩锆石U-Pb年龄为217.1±0.8 Ma,形成时代为晚三叠世。日里隆巴花岗闪长岩和花岗岩属于过铝质系列,具有高硅碱、低铁镁及弱的Nb、Ta负异常,均属于S型花岗岩,但后者经历了更高程度的分异,分别为碰撞期和后碰撞期岩浆活动的产物,获得日里隆巴花岗闪长岩锆石U-Pb年龄为203.6±0.5 Ma,形成时代为晚三叠世末。结合区域资料认为,晚三叠世甘孜-理塘洋盆大规模向西俯冲,少量的弧岩浆岩就位于被动大陆边缘雅江残余盆地;晚三叠世末期,由于洋板块的消亡发生弧-陆碰撞,地壳发生部分熔融,形成强过铝质花岗岩。 展开更多
关键词 新龙地区 雅江残余盆地 花岗岩 锆石U-PB测年 地球化学 地质调查工程 四川
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四川省山洪灾害防治项目实施方案设计探讨
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作者 李萍 黄尔 杨涛 《中国防汛抗旱》 2024年第7期6-9,41,共5页
四川省因其特殊地形地质条件和地理位置,成为山洪灾害多发频发的省份之一。山洪灾害破坏性强,给人民生命财产安全带来了严重威胁。根据四川省山洪灾害成因和特点,提出非工程措施和重点山洪沟相结合的治理方案。在常规的非工程防御措施... 四川省因其特殊地形地质条件和地理位置,成为山洪灾害多发频发的省份之一。山洪灾害破坏性强,给人民生命财产安全带来了严重威胁。根据四川省山洪灾害成因和特点,提出非工程措施和重点山洪沟相结合的治理方案。在常规的非工程防御措施基础上,建立危险区动态和分级管理清单,同时结合动态预警指标分析,开展省级山洪灾害风险预报预警服务和预警信息发布工作,并结合重点山洪沟的治理,打造出契合四川省特点的山洪灾害防治体系。 展开更多
关键词 山洪灾害 非工程措施 危险区动态和分级管理 动态预警指标 四川省
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四川仪陇—平昌地区长兴组-飞仙关组层序地层及沉积演化
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作者 廖鑫羽 肖云鹏 宋振宇 《地质通报》 CAS CSCD 北大核心 2024年第2期350-362,共13页
四川仪陇—平昌地区,特别是环开江-梁平海槽区域的长兴组—飞仙关组蕴藏着大量油气资源,但其三级层序划分方案有待统一。基于最新的钻井岩心、测井、野外露头资料综合分析,识别出岩性岩相突变界面及局部暴露不整合界面2种Ⅱ型层序界面,... 四川仪陇—平昌地区,特别是环开江-梁平海槽区域的长兴组—飞仙关组蕴藏着大量油气资源,但其三级层序划分方案有待统一。基于最新的钻井岩心、测井、野外露头资料综合分析,识别出岩性岩相突变界面及局部暴露不整合界面2种Ⅱ型层序界面,将仪陇—平昌地区的长兴组-飞仙关组划分为4个三级层序,建立了层序地层格架。该区目的层主要发育典型的镶边台地沉积体系,至晚期海槽消失,发育陆表海型台地体系开阔台地及蒸发台地。长兴组沉积期,开江-梁平海槽范围逐渐扩大,高位域是生物礁发育的有利阶段,由于SQ2晚期海平面急速下降,其生物礁规模较SQ1时期有所减小;飞仙关组沉积早期海平面快速上升,鲕粒滩难以形成,随后进入整体海退阶段,至SQ3高位域时期,鲕粒滩连片发育。层序划分方案与礁、滩储层发育特征匹配,能够应用于下一步油气勘探。 展开更多
关键词 长兴组 飞仙关组 层序划分 沉积演化 仪陇—平昌地区 四川
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四川省特色农产品优势区建设现状及对策
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作者 李欢欢 王雪 +2 位作者 付梦芸 陈浩 许轲 《现代农业科技》 2024年第12期195-198,共4页
特色农产品优势区建设是推动农业供给侧改革、调整产业结构和提升农产品竞争力的重要措施。本文总结了四川省特色农产品优势区建设现状,分析了产业发展存在的问题,包括基础设施建设参差不齐、农产品加工能力不足、产业融合不够等,并提... 特色农产品优势区建设是推动农业供给侧改革、调整产业结构和提升农产品竞争力的重要措施。本文总结了四川省特色农产品优势区建设现状,分析了产业发展存在的问题,包括基础设施建设参差不齐、农产品加工能力不足、产业融合不够等,并提出了针对性的建议,以期为建设高质量特色农产品优势区、做大做强特色农业产业提供参考。 展开更多
关键词 特色农产品优势区 现状 问题 对策 四川省
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Fission track dating of the Cenozoic uplift in Mabian area, southern Sichuan Province, China 被引量:14
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作者 AN YanFen HAN ZhuJun WAN JingLin 《Science China Earth Sciences》 SCIE EI CAS 2008年第9期1238-1247,共10页
The apparent ages of samples are obtained from fission track dating of apatite samples collected from the fault zones in Mabian area, southern Sichuan Province. In addition, thermal history is simulated from the obtai... The apparent ages of samples are obtained from fission track dating of apatite samples collected from the fault zones in Mabian area, southern Sichuan Province. In addition, thermal history is simulated from the obtained data by applying AFT Solve Program, to acquire the thermal evolution history of the samples. The result shows that tectonically the Mabian area was relatively stable between 25 and 3 Ma, compared to the inner parts and other marginal areas of the Tibetan Plateau. The studied area had little response to the rapid uplift events that occurred for several times in the Tibetan Plateau during 25-3 Ma. The latest thermal event related to the activity of the Lidian fault zone (about 8 Ma ) is later than that of the Ebian fault zone (18-15 Ma ) to the west, indicating to some extent that the evolution of fault activity in the Mabian area has migrated from west to east. The latest extensive tectonic uplift occurred since about 3 Ma. As compared with the Xianshuihe fault zone, the Mabian area is closer to the east- ern margin of the plateau, while the time of fast cooling event in this area is later than that in the southeast segment of the Xianshuihe fault zone (3.6-3.46 Ma ). It appears to support the assumption of episodic uplift and stepwise outward extension of the eastern boundary of the Tibetan Plateau in late Cenozoic. 展开更多
关键词 Mabian area SOUTHERN sichuan province APATITE FISSION track thermal history simulation UPLIFT fault activity
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基于GIS空间技术和MaxEnt模型预测川西松材线虫病入侵风险 被引量:5
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作者 许格希 余荣兵 +3 位作者 杨昌旭 刘怀君 周珠丽 沈延京 《北京林业大学学报》 CAS CSCD 北大核心 2023年第9期104-115,共12页
【目的】松材线虫在我国主要以松墨天牛和云杉花墨天牛为传播媒介,感染林木后常导致森林毁灭性破坏。预测松材线虫病入侵风险不仅对森林保护与质量提升具有重要参考价值,还关乎我国生态安全与碳中和目标的实现。【方法】本文基于川西理... 【目的】松材线虫在我国主要以松墨天牛和云杉花墨天牛为传播媒介,感染林木后常导致森林毁灭性破坏。预测松材线虫病入侵风险不仅对森林保护与质量提升具有重要参考价值,还关乎我国生态安全与碳中和目标的实现。【方法】本文基于川西理县24个云杉花墨天牛和55个枯死松树(云杉花墨天牛羽化前载体)地理分布点以及20个生物与非生物因子数据,利用GIS分析工具和最大熵模型(MaxEnt)对该县云杉花墨天牛适生区和枯死松树潜在分布区进行预测,并通过MaxEnt软件内建的刀切法剖析影响云杉花墨天牛适生区与松树分布区的主要因子。考虑到松材线虫病发生至少需同时具备传播媒介(云杉花墨天牛)和载体(松树)二要素,将云杉花墨天牛适生区和枯死松树分布区数据进行加权求和,预测松材线虫病发生的潜在分布区,评估其入侵风险。【结果】研究发现MaxEnt模型对云杉花墨天牛适生区和枯死松树分布区的预测工作特征曲线的下面积值分别为0.993和0.969,表明模型的预测结果为优,可用于松材线虫病潜在入侵风险预测。松材线虫病潜在入侵风险评估发现距居民点1.5 km内、年均气温为7.8~10.1℃、最湿季降水量为345~358 mm时松材线虫病潜在发生风险最高。模型预估理县松材线虫病潜在发生高风险区面积为10616 hm^(2),沿道路呈带状分布于各乡镇,占县域针叶林总面积7.1%。【结论】基于GIS空间技术和MaxEnt模型有助于预测川西林区松材线虫病入侵风险。但是,随着经济建设与气候变化,川西松材线虫传播与发生存在较大不确定性,应加强居民点、公路沿线松材线虫及其传播媒介的监测,完善防控应急预案,保障川西林区生态安全。 展开更多
关键词 松材线虫 MaxEnt模型 ARCGIS 入侵风险 理县 川西林区
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丘陵地区农业机械化率影响因素研究——基于四川省10个典型县(市、区)的质化研究 被引量:2
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作者 杨小杰 文媚 +1 位作者 赵茁会 王霜 《中国农机化学报》 北大核心 2023年第11期224-230,共7页
为提升我国丘陵地区农业机械化水平,提高农业综合生产能力,以四川丘陵地区为例,对10个典型县(市)的相关人员进行调研,运用Nvivo12质性分析软件中的主轴编码法和内容分析方法,对调研资料进行提炼和整理,探寻影响四川丘陵地区农业机械化... 为提升我国丘陵地区农业机械化水平,提高农业综合生产能力,以四川丘陵地区为例,对10个典型县(市)的相关人员进行调研,运用Nvivo12质性分析软件中的主轴编码法和内容分析方法,对调研资料进行提炼和整理,探寻影响四川丘陵地区农业机械化率的主要因素。研究发现:影响四川丘陵地区农业机械化率的主要因素包括自然地理条件、政策方面、市场化因素、农业产业化方面、农机装备水平、农机农艺融合度、劳动力因素及基础设施建设水平八个方面。在19个二级编码中,地形条件、农机社会化服务、农机装备结构及土地耕作条件占比均超过9.93%,属核心因素。基于此,提出需要推动宜机化设施建设与改造,提高设施水平;加大先进农机装备推广应用,提高装备水平;培育现代农机经营服务组织,提高服务水平等建议。 展开更多
关键词 四川省 丘陵地区 农业机械化率 质化研究 农机社会化服务 农机装备结构
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三高条件对弹韧性水泥浆性能的影响及短期腐蚀机理
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作者 于林 谭慧静 +2 位作者 任阳 刘思艳 叶有 《钻井液与完井液》 CAS 北大核心 2023年第2期222-232,共11页
针对固井水泥石所处的高温高压含H_(2)S/CO_(2)腐蚀环境以及复杂工况,开展三高条件下弹韧性水泥浆的性能变化及短期腐蚀机理研究。基于弹韧性外掺料的3种主要类型,采用向G级油井水泥中分别加入10%橡胶粉末、0.3%玄武岩纤维以及10%丁苯... 针对固井水泥石所处的高温高压含H_(2)S/CO_(2)腐蚀环境以及复杂工况,开展三高条件下弹韧性水泥浆的性能变化及短期腐蚀机理研究。基于弹韧性外掺料的3种主要类型,采用向G级油井水泥中分别加入10%橡胶粉末、0.3%玄武岩纤维以及10%丁苯胶乳的方式制备弹性水泥浆。通过力学性能测试、XRD、FTIR、MIP及SEM-EDS测试,分析弹韧性材料添加前后及腐蚀前后,水泥石的力学性能、孔径分布、水化产物类型及微观结构变化。结果表明,掺入3种弹韧性材料均有利于水泥石的脆度系数降低、韧性提高,其中玄武岩纤维最利于控制材料破坏时裂缝的发展,而丁苯胶乳最利于降低材料的弹性模量和保持较大的抗折强度。经过短期液相腐蚀后,水泥试样的力学强度均出现增长,特别是掺入玄武岩纤维和丁苯胶乳的试样。玄武岩纤维在该研究中的腐蚀条件下性能稳定,腐蚀反应生成的致密碳酸钙晶体堆积于玄武岩纤维与水泥基质界面孔隙处,引起了腐蚀后材料总孔容的减小及力学强度的大幅度增长。丁苯胶乳在水泥石中形成聚合物膜,覆盖及包裹水泥基质,可提高复合水泥表面的耐腐蚀性能。 展开更多
关键词 弹韧性水泥浆 高温 高压 H_(2)S CO_(2) 腐蚀 川东北地区
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