A land-use mix allocation model considering adjacency,intensity, and proximity     

Sunyong Eom  Tsutomu Suzuki  Myeong-Hun Lee 《International journal of geographical information science》2020,34(5):899-923

ABSTRACT

Land-Use Mix (LUM) refers to the strategy of integrating complementary functions within a building or area. While LUM has become a dominant approach in urban planning, its actual benefits and vision for spatial planning remain unclear. To clarify this issue, this study discerns the spatial features of land-use patterns depending on the compatibilities among land-use categories. Accordingly, this study introduces three LUM measures – adjacency, intensity, and proximity – to identify differences in the spatial distribution of land-use categories. Based on these measures, a land-use allocation model is developed to specify spatial patterns satisfying the given compatibilities. This model is tested by applying the concept of the neighborhood unit on a case study of normative land-use patterns subject to specified compatibilities. The results describe spatial features of four compatibility sets, including a set exhibiting a compatibility conflict between the same land-use pair and LUM measures when, for example, a given land-use pair is compatible in terms of intensity but incompatible in terms of proximity. Understanding the spatial features of a normative land-use pattern that satisfies various possible compatibilities will facilitate the incorporation of the LUM approach into local planning guidance and zoning ordinances.  相似文献   

Neoliberalizing environmental governance? Land trusts, private conservation and nature on the Oak Ridges Moraine     

Shannon Logan  Gerda R. Wekerle 《Geoforum》2008,(6):2097-2108

With recent changes in the ways that state agencies are implementing their environmental policies, the line between public and private is becoming increasingly blurred. This includes shifts from state-led implementation of environmental policies to conservation plans that are implemented and managed by multi-sectoral networks of governments, the private sector and environmental non-governmental organizations (ENGOs). This paper examines land trusts as private conservation initiatives that become part of neoliberal governance arrangements and partnerships that challenge our conceptions of environmental preservation and democratic participation. The paper starts with an examination of the concept of neoliberalized environmental governance. Next, it addresses the shifting social constructions of property and land in the context of protecting large scale ecosystems. Through a case study of the extension of new environmental governance arrangements on the Oak Ridges Moraine in Ontario, we examine the relationships that have formed between different levels of the state and environmental non-governmental organizations. Finally, we analyze the expansion of land trusts and private conservation initiatives that are predicated on private land ownership and the commodification of nature, the emerging discourses and practices of private conservation, and how these are implicated in the privatization and neoliberalization of nature.  相似文献   

干旱生态环境及水资源对全球气候变暖响应的研究进展   总被引：7，自引：5，他引：2  

邓振镛  张强  辛吉武  赵鸿  王全福  王鹤龄 《冰川冻土》2008,30(1):57-63

西北地区现代气候变化基本特征是冬暖夏干,采用脆弱度和影响指数方法定量评价了生态环境对全球气候变暖响应,重点阐述了西北现代气候变化对干旱生态环境和水资源这两个领域的影响.结果表明: 由于现代气候变干变暖的自然和人为因素的共同作用,导致我国西北地区的黄土高原、黑河流域、石羊河流域、甘南高原和黄河首曲的地域生态环境有不断退化的趋势.气候变干使渭河上游、黄河上游(洮河和大夏河)以及黄土高原中部7条主要河流的径流量呈明显下降趋势,引起水资源短缺.  相似文献   

青岛胶州湾地区重大工程建设项目设计的地质基础   总被引：3，自引：0，他引：3  

张金川  任鲁川 《海洋湖沼通报》1995,(4):9-15

本文以青岛胶州湾地区的基本地质条件为基础，分析研究了该地区地质基础对重大工程建设项目设计的影响，提出了青岛市重大工程项目设计的基本原则和对城市整体规划的具体建议。  相似文献   

The role of marine spatial planning in sea use management: The Belgian case   总被引：1，自引：0，他引：1  

F. Douvere  F. Maes  A. Vanhulle  J. Schrijvers 《Marine Policy》2007

The expansion of offshore activities and the increasing need to meet international and national commitments to biodiversity conservation have led to an enhanced interest in marine spatial planning (MSP) as a tool for sea use management. Several European countries, on their own initiative or driven by European legislation and policy, have taken global leadership in implementing MSP. This article will discuss the Belgian experiences with MSP. It will give a short historical overview based on legal developments and review the implementation process of a ‘Master Plan’ as a spatial management policy for the Belgian Part of the North Sea. Additionally, this article will reflect on the research that has been done in Belgium to apply a land-use planning approach to the marine environment. The MSP process in Belgium shows that a spatial approach to sea use management is possible despite the lack of a legal zoning framework. However, it concludes that a legal basis for MSP, in addition to the current permit system, would provide a more strategic and integrated framework for ecosystem-based, sea use management.  相似文献   

Spatial patterns and environmental risks of ringnet fishing along the Kenyan coast     

P Thoya  S Pérez-Jorge  GM Okemwa  H Mwamlavya  A Tuda  N Wambiji 《African Journal of Marine Science》2020,42(1):23-33

Ringnet fishing began in the early 20th century and is practised worldwide, mainly to target nearshore pelagic species. The method was introduced to Kenya’s coastal waters by migrant fishers from Tanzania. However, the impacts of this fishing gear remain poorly assessed. We assessed the spatial distribution of ringnet fishing effort and its possible effects on ecosystem components, such as coral reefs, marine megafauna and marine protected areas, on the south coast of Kenya. We tracked 89 ringnet fishing trips made from December 2015 to January 2016 and used spatial multicriteria analysis to determine hotspots of possible environmental risks. The results showed that habitat type and bathymetric profile influenced the spatial distribution of ringnet fishing effort. Mixed seagrass and coral habitats had the highest concentration of the effort. Most of the habitats in the study area were moderately exposed to the impacts of the ringnet fishery. The study identifies high-risk areas that require spatial measures to minimise possible environmental risks of the gear both to habitats and to endangered sea turtles.  相似文献   

A proposed multiple-use zoning scheme for the Irish Sea.: An interpretation of current legislation through the use of GIS-based zoning approaches and effectiveness for the protection of nature conservation interests     

Suzanne J. Boyes  Michael Elliott  Shona M. Thomson  Stephen Atkins  Paul Gilliland 《Marine Policy》2007

  相似文献   

我国海域分等定级指标体系研究   总被引：3，自引：0，他引：3  

陈明剑  何国祥 《海洋学报》2002,24(3):18-27

长期以来,海域的无偿使用导致海洋开发活动秩序混乱、海洋环境污染加剧、海洋生物资源枯竭、海洋生态环境遭到破坏,严重阻碍和制约沿海地区的可持续发展.本文试图根据经济学的“地租级差”理论和运筹学中的“层次分析法”并结合我国沿海11个省、市和自治区的社会、经济、基础设施、自然资源等因素进行理论探讨,给出了我国管辖海域的等级.为今后我国制定海域有偿使用金的征收标准奠定基础.  相似文献   

Application of the first internal transcribed spacer(ITS-1) of ribosomal DNA as a molecular marker to population analysis in farrer''s scallop Chlamys farreri     

YU Ziniu  WEI Xiaohu  KONG Xiaoyu  YU Shanshan 《海洋学报(英文版)》2007,26(1):93-100

Sequence variation of the first internal transcribed spacer of ribosomal DNA （ ITS - 1 ） was examined and its application to the study of genetic variation was explored in four populations of farter＇ s scallop Chlamys farreri. ITS - 1 fragments, with a length of about 300 bp,of 78 individuals collected from Dalian, Qingdao, Yantai in China and Korea respectively were amplified via PCR, cloned and sequenced. Intra-genomic variation was examined by sequencing several clones of single individuals. Alignment and polymorphism analysis detected 44 haplotypes and 50 polymorphic sites which consist of 30 substitutions and 20 indels, indicating a high level of polymorphisms. Sequence analysis also showed a very low level of intra-individual variation. All these features validated the feasibility of application of ITS - 1 fragment to population analysis. Polymorphism analysis showed that the Korea sample has the richest genetic variation, followed by Yantai and Qingdao samples. AMOVA （analysis of molecular variance） showed that the majority （96.26%） of genetic variation was distributed within populations and 3.74% resulted from among populations, but with P 〈 0.05 （ = 0.042）, indicating that the populations in this study have significant divergence. This output was basically concordant with the result arising from RAPD data and different from that from mitochondrial 16S rDNA sequence data. Discussion on this inconsistency was made accordingly.  相似文献   

南四湖,东平湖资源综合开发问题探讨   总被引：1，自引：0，他引：1  

杨林芳  王有邦 《海洋湖沼通报》1994,(4):35-41

南四湖，东平湖是华北重要的淡水湖，湖区自然条件优越，资源丰富，有巨大开发潜力。本文分析湖区资源特征，开发利用现状和存在问题，提出合理开发利用途径与对策。  相似文献