明清以降漓江上游地区的人类活动与环境变迁研究

漓江沙洲的形成,是自然环境和人类活动交互影响的结果。明清以降,外来人口不断进入漓江上游地区从事农业垦殖活动。垦殖活动在改造了上游山区自然环境的同时,其产生的泥沙在雨水作用下进入漓江,促进了桂林段漓江沙洲的发育,并改变了桂林段漓江河床的面貌。岸上居民也开始由岸上洲,这是漓江流域人地关系的重要变化。     

农业历史地理环境变迁与农业地域拓展

农业地理环境是农业生产诸自然条件中影响最大的因素之一。历史过程之中,以地理环境条件为基础,伴随农业生产技术的纵深迈进,农业经济的开发与中心转移呈现出明显的层次性与地域性特征:率先是黄河中下游地区的旱作农区,次为长江流域稻作农区,进而是高寒农区的开发。     

Local Knowledge and Economic Realities Affecting Soil Erosion in the Rach Rat Catchment,Vietnam

Several parts of Binh Phuóc Province, southern Vietnam, suffer from degraded soils and vegetation as a result of both natural erosion of weak mud rocks and sandstones and intensive human activity, especially through land clearing for agriculture on unstable slopes, deforestation, and abandonment of poor farmland. The underlying cause of this land degradation has been the farming habits of migrants of varying ethnic groups who have settled in the area since 1980. The indigenous farming knowledge of these people and the role of that knowledge in soil erosion were examined by a series of household surveys. They enabled farming practices to be related to ground cover established from a 2002 Landsat 7 ETM (Enhanced Thematic Mapper), and erosion data from a series of erosion bridge measurements. A GIS (Geographical Information System) approach was piloted as a means of identifying areas vulnerable to erosion. This could then be combined with the understanding of farming practices to reveal the relative roles of farmer behaviour, crop cover, and slope and soil characteristics in the erosion process. Land use, local people's knowledge and economic realities are the main factors, as well as natural conditions, that drive this land degradation.     

VON THUNEN AND THE SIGNIFICANCE OF HIS WORK FOR THE GEOGRAPHY OF AGRICULTURE

Von Thünen's classical model of agricultural location was published in the Soviet Union in Russian translation in 1926, a hundred years after its original publication in Germany, but was soon denounced as a bourgeois theory seeking to optimize location from the point of view of minimizing production costs or maximizing the profit of the entrepreneur. The view that the von Thünen model was not applicable to Soviet conditions was stated as late as 1966 in Vol. V of the Kratkaya geograficheskaya entsiklopediya [Short Geographical Encyclopedia], pp. 196, 525. A Moscow University agricultural geographer, in reassessing the von Thünen model, now points out that its objective of determining optimal production systems for a given set of physical (land quality) and economic (market) conditions is shared by anyone who seeks the most highly cost-effective form of agriculture in a particular setting.     

Modeling agricultural potential in Chaco Canyon during the Bonito phase: a predictive geospatial approach

This study presents a geospatial analysis of surficial hydrology and geomorphology and their relationship to potential agricultural productivity in order to better understand the economic role of water in Chaco Canyon during the Bonito Phase (ca. AD 850–1150). Defined as the Natural Agricultural Suitability Analysis, the foundation of this study is a hierarchical geospatial analysis that integrates six key natural factors: slope, soil texture, soil depth, non-catastrophic overbank flooding potential, drainage flow length, and drainage proximity and flow potential. These factors are combined through a raster weighted overlay function to generate composite suitability map that offers a testable proxy for variability in relative agricultural potential during the Bonito Phase at Chaco. The rationale for including this set of natural factors is based largely on ethnographic and modern agricultural studies, but the predictive model differs from previous studies of agricultural potential in that it is independent of the specific archaeological distribution of evidence of agriculture in the study area. The results of this analysis suggest that previous models of Chacoan agricultural productivity have underestimated local production capacity. Previous studies have focused solely on floodplain contexts, whereas this study points to a more comprehensive and geographically distributed use of the landscape.     

宋元时期吴淞江流域的稻作生态与水稻土形成

北宋初期,吴淞江流域仍有许多圩田内存在着大量的休耕地与不得耕种的积水田,水稻土的脱潜与剖面发育较慢。到了后期,吴淞江流域的水环境和农作技术都在推动着水稻土剖面的完全形成。宋初的丰水环境出现了变化,吴淞江的淤塞使这一地区的旱田化作用增加,脱潜化程度加强。与此同时,农作技术的发展,特别是搁稻、施肥、翻青和开沟技术,都促进了水稻土的良性发展。     

山西省农业土地资源可持续利用研究

农业土地资源的可持续利用是实现农业可持续发展的基础和保证。本文通过分析山西农业土地资源的特点,开发利用现状及存在的主要问题,提出了山西农业土地资源可持续利用的主要措施:加快退耕还林步伐,调整农业用地结构,优化农业生态环境;加强生态农业建设,合理利用土地资源,提高土地生产率;加大农业生态环境整治力度,防止土地退化,减轻自然灾害;强化土地管理,规范土地市场,保护农业土地资源。     

Drivers of Unsustainable Land Use in the Semi‐Arid Khabur River Basin,Syria

The semi‐arid zone of Southwest Asia, known as the Fertile Crescent, is under unprecedented stress because of agricultural development. Where rain‐fed agriculture and transhumant herding had prevailed over ten millennia, today intensive cultivation with irrigation threatens future sustainability. A number of interconnected, but uncoordinated drivers of change combine to shape the landscape and its future, and their changes make it hard to anticipate future requirements and opportunities, as well as to implement policies, whether by local stakeholders or at the national level. Among the factors that comprise the socio‐natural systems are (1) climate, (2) water and soil resources, (3) history of land use, (4) social, economic and political factors, (5) infrastructural developments (6) interstate impacts, and (7) legacies of the past. The example of the Khabur River drainage in northeastern Syria shows the dynamic interplay among these factors over the past 70 years, with implications for the way future policies and practices are developed.     

Terriers and the historical geographer

Terriers were surveys of the sources, chiefly land or `gleeb', owned by each ecclesiastical parish in England and Wales. Their purpose was to prevent theft. They were first ordered in 1604, though earlier examples survive. Thereafter bishops commonly called for the presentation of a terrier on the occasion of their visitation of the parishes of their dioceses. Most dioceses thus have ‘sets’ of terriers, each relating to a particular visitation.Sets survive from the early seventeenth century to the eighteenth. Thereafter their compilation was more random. Despite loss and damage, they present a very detailed picture of rural and tenurial conditions. They also contain data on crops and field systems, as well as of parsonages (vernacular architecture), place-names and the personal names of parishioners. There are some urban terriers, but in the absence of agricultural land, they are very much less informative.An Appendix presents a guide to the present location of surviving terriers.     

The Role of Surface Water Drainage in Environmental Change: a Case Example of the Upper South East of South Australia; an Historical Review

The role of surface water drainage in environmental change in Australia is rarely appreciated. Drains can modify surface water hydrology, not only altering flow regimes but also rapidly dispersing contaminants and altering the natural hydrological balance of associated flora and fauna. Yet drainage continues to be considered a viable management strategy rather than as a cause of land degradation. The impact of surface water drainage in an inherently saline area of South Australia, the Upper South East, is investigated. Surface water drains were constructed by developers in an attempt to increase the area of land available and viable for agricultural land use. Drainage strategies altered the natural direction, magnitude and frequency of surface water flow. The Upper South East has experienced periods of both increased surface water and flooding, and surface water deficit, in the past one hundred years. The region now receives less surface water than under pre‐European conditions, but local runoff is channelled into and through the wetlands more rapidly than before European settlement. Future management strategies are likely to continue this trend, to the detriment of remnant natural wetlands.     

从环境史角度看乾隆年间天山北麓的农业开发

本文在前人研究新疆屯田史、农业开发史和自然环境变迁的基础上,从环境史的角度出发,利用丰富的历史文献记载,集中探讨了乾隆年间天山北麓农业开发活动中人与自然环境之间的关系发生、发展和变化的过程。本文主体内容的第一部分概括天山北麓自然环境特点的基础和大规模农业开发以前天山北麓的游牧文化景观,这是理解乾隆年间人与环境互动的基础;第二部分,通过引用丰富的历史记载,细致而微地呈现了乾隆年间迁移而来的农耕民族如何看待这片土地、农业耕种如何从无到有、由内地带来的农业耕作制度和技术如何适应当地自然环境等人与环境的互动过程;最后,复原了乾隆六十年(1795)天山北麓的地理景观,总结指出乾隆年间天山北麓地理景观的变化主要发生在平原地区(出现的农业聚落和绿洲农业景观),迁移而来的屯兵、户民和天山北麓的自然环境共同造就了乾隆末年天山北麓的地理景观特征。     

基于多因素综合评价法的城市土地定级评价研究——以银川市为例

多因素综合评价法能全面考虑各种与土地质量直接相关的因素,不仅包含了影响土地价值的经济因素,而且包含了其他因素。本文在分析已有文献的基础上,构建了针对城市土地综合定级评价的指标体系,运用特尔斐法结合方差和均值修正确定指标体系权重,选取银川市建成区的六个样本点,结合多因素综合评价法进行了实例分析,通过对评价结果进行分析,可知分等定级结果符合银川市城市发展建设的实际情况。     

Notes on the Cameroon province (with special‐reference to the Bamenda division)

The location decisions of settlers to Upper Canada, 1782‐1851, are related to several factors. Initial settlement cores resulted from the previous pattern of French occupation and the need to strengthen the border with the United States. The availability of surveyed land influenced location decisions throughout the period. Of less significance were the land‐granting procedure and the various official policies which prompted land speculation and resulted in areas of reserved land.     

LAND USE POLICY AS AN INTERNATIONAL ISSUE

Land use is not an end in itself; it is a means to the realization of a broad range of human objectives – social, economic and political. Few public issues appear to be more strictly national. In environment-related United Nations conferences, Third World representatives in particular have asserted the absolute control of nations over their land and natural resources. Nevertheless, international concern over land use has been growing. This concern is both scientific and political and derives from the perception that use and misuse of land may have international repercussions. Developing countries facing disastrous consequences of unwise land use practices (e.g., soil erosion, desertification, water logging and salinization, laterization, and loss of agricultural land to urbanization) have appealed to international organizations for aid. FAO, UNEP, IUCN, ICSU, and the UN Economic Commissions have undertaken land-use related research and assistance programs. Political sensitivities preclude external involvement in national land use policy except in dire circumstances as, for example, in the drought-stricken African Sahel. Thus legitimate international concerns must find indirect strategies to influence governments from among their own national constituents. The IUCN World Conservation Strategy suggests a route that might lead toward concerted action among nations in the formulation of genuine international land use policy.     

基于最优插值函数优选的小城镇商业用地地价空间结构分析——以西安市蓝田县城区为例

根据在西安市蓝田县城区调查的商业用地地价资料,利用ArcGis软件,从8种常用的插值方法中,以估计值与观察值的标准差最小为原则,筛选出适合于商业用地建立GRID数据的最优插值函数为克里金指数半变差函数模型,并利用该模型建立了商业用地的地价面,在此基础上对商业用地的地价空间结构进行了分析。结果表明:小城镇商业用地地价的变化呈同心圆结构,即城市中心区地价最高,向外逐渐降低。商业用地地价与道路两侧的商店密度性、临街道路的类型以及文化娱乐设施的分布密度正相关,相关系数分别为0.946、0.693和0.659;而与金融保险机构的个数以及土地所有权的性质相关性不强。     

Developing a Synthetic Index of Land Vulnerability to Drought and Desertification

This paper develops an index of the vulnerability of land to drought and desertification (LVI) for Italy. The index takes into account changes in climate, land use, vegetation cover, soil properties, and population during the period 1990–2000. The LVI was built up through a multivariate approach aimed at assessing the importance of the various indicators included in the synthetic index. Increasing land vulnerability was observed during this time, especially in dry areas of the southern regions. This is interpreted as a consequence of land management practices, agricultural intensification, population pressure, and bio-physical degradation. The LVI can be used in an integrated, decision-support system to evaluate the impact of mitigation policies in rural environments.     

National Factor Markets and the Macroeconomic Context for Environmental Destruction in the Brazilian Amazon

This paper discusses Amazonian agricultural development with emphasis on the interrelations between regional conditions and the economic context represented by the national economy. The extreme abundance of land relative to complementary factors, together with the position of the region as a price taker in both factor and output markets, create the conditions for environmentally destructive expansion of cultivation at the extensive margin. It is argued that policies to promote a more ecologically sensitive pattern of development must take into account these links with the larger Brazilian economy and society as well as conditions within the region itself.     

Promised Land: Settlement Schemes in Kenya, 1962 to 2016

Smallholder settlement schemes have played a prominent role in Kenya's contested history of state-building, land politics, and electoral mobilization. This paper presents the first georeferenced dataset documenting scheme location, boundaries, and attributes of Kenya's 533 official settlement schemes, as well as the first systematic data on scheme creation since 1980. The data show that almost half of all government schemes were created after 1980, as official rural development rationales for state-sponsored settlement gave way to more explicitly welfarist and electoralist objectives. Even so, logics of state territorialization to fix ethnicized, partisan constituencies to state-defined territorial units pervade the history of scheme creation over the entire 1962–2016 period, as theorized in classic political geography works on state territorialization. While these “geopolitics” of regime construction are fueled by patronage politics, they also sustain practices of land allocation that affirm the moral and political legitimacy of grievance-backed claims for land. This fuels on-going contestation around political representation and acute, if socially-fragmented, demands for state-recognition of land rights. Our findings are consistent with recent political geography and interdisciplinary work on rural peoples' demands for state recognition of land rights and access to natural resources. Kenya's history of settlement scheme creation shows that even in the country's core agricultural districts, where the reach of formal state authority is undisputed, the territorial politics of power-consolidation and resource allocation continues to be shaped by social demands and pressures from below.     

The geographical distribution of Labour

The small volcanic and limestone islands of the Lesser Antilles, in the eastern Caribbean, have a continuous history of commercial agricultural production which goes back 370 years. During this period, conditions of the environment, both natural (volcanoes, earthquakes, hurricanes, droughts) and human‐induced (deforestation, erosion, land degradation and reduction in the water‐table), have interfered with development in a variety of ways. The paper reviews past and present situations, and considers how growing sectoral imbalances may accentuate the resulting problems.     

河南省农区发展差异及空间演化分析

运用层次分析法建立农区发展水平综合评价指标体系,并借助GIS、GeoDA软件,结合ESDAGIS空间分析方法,深入分析1990-2013年河南省县级尺度农区发展差异及空间演化。研究发现：①近20多年来河南省农区发展水平逐渐提高;高水平区分布在矿产资源丰富的空间界面处,较高水平区位于高水平区外围和地级市周边地区,中等水平区位于平原区,低及较低水平区位于山地丘陵区;②1990-2013年河南省农区发展水平相似的县级单元在空间上呈集聚分布且集聚效应逐渐减弱,以HH和LL类型区为主且稳定性较强,而HL和LH类型区较少且稳定性较差;③农区发展的突破点在于空间界面处和创造良好的区位。同时,这也是从空间思维的角度来对以往空间结构理论多以城市研究为中心的有益补充。