宝鸡峡林家村水库库区水面漂浮物治理

本文对林家村水库库区漂浮物的情况,从分类、形成、影响等方面进行了分析,结合水库漂浮物治理存在的问题,提出了具体的漂浮物治理方案及建议,可供水库清漂人员参考。     

Potential for electrification from biomass gasification in Vanuatu

At least 170,000 rural people in the Pacific-island nation Vanuatu (approximately 70% of the country’s population) live without reliable access to electricity. The few rural households that do consume electricity incur high prices for imported diesel fuel ($2-3/liter). Thus, there is an important role in Vanuatu for expanding cost-competitive, non-diesel alternatives for electricity generation.Informed by an interdisciplinary data synthesis and an extensive series of field interviews in Vanuatu, this paper analyzes the potential for converting reportedly obsolete timber plantation land into a dedicated feedstock supply system for new small-scale biomass gasifiers. The analysis draws upon geographic mapping of electricity demand and feedstock supply, a historical assessment of Vanuatu’s forest plantations, a techno-economic evaluation of investment in 10 kW and 30 kW gasifiers, and a discussion of important social-institutional factors.This analysis identifies up to 13 geographic matches between areas of rural electricity demand and potential feedstock supply. In addition, financial modeling suggests that the levelized cost of electricity from gasification is competitive (relative to diesel systems) given capacity factors of 15-40% or greater (corresponding to a cost of $1.60/kWh or less). Further research is recommended to examine the socioeconomic and ecological aspects of feedstock plantation establishment in Vanuatu.     

Above ground standing biomass and carbon storage in village bamboos in North East India

Bamboo forms an important component in the traditional landscape of North East India. For biomass estimation of village bamboos of Barak Valley, North East India, allometric relationships were developed by harvest method describing leaf, branch and culm biomass with DBH as an independent variable using a log linear model. The culm density of the stand was 8950 culms ha⁻¹ during 2005 of which 67% of growing stock was represented by Bambusa cacharensis, 17.88% by Bambusa vulgaris and 15.12% by Bambusa balcooa. Above ground stand biomass was 121.51 t ha⁻¹ of which 86% was contributed by culm component followed by branch (10%) and leaf (4%). With respect to species, B. cacharensis made up to 46% of total stand biomass followed by B. vulgaris (28%) and B. balcooa (26%). Carbon storage in the above ground biomass was 61.05 t ha⁻¹. Allocation of C was more in culm components (53.05 t ha⁻¹) than in branch (5.81 t ha⁻¹) and leaf (2.19 t ha⁻¹). Carbon storage in the litter floor mass was 2.40 t ha⁻¹, of which leaf litter made up the highest amount (1.37 t ha⁻¹) followed by sheath (0.86 t ha⁻¹) and branch (0.17 t ha⁻¹). Carbon stock in the soil up to 30 cm depth was 57.3 t ha⁻¹. Gross C stock in the plantation was estimated to be 120.75 t ha⁻¹. Carbon storage estimated in the bamboo stand of present study offers insights into the opportunity of village bamboos in the rural landscape for carbon storage through carbon sequestration. Management and utilization of village bamboos as a potential source of carbon sink by smallholder farmers are discussed in the context of their livelihood security and the Millennium Development Goals of the United Nations.     

河口村水库工程管理设计研究

河口村水库工程位于流经河南省济源市克井镇境内的黄河一级支流沁河峡谷段,属新建大(2)型水利枢纽,其开发任务以防洪、供水为主,兼顾灌溉、发电、改善河道基流,也是黄河下游防洪体系和水沙调控体系的重要组成部分。为充分发挥工程的综合效益,促进水资源的可持续利用,保障经济社会的可持续发展,工程管理设计应具有为水库生产、经营管理以及职工生活所必备的管理条件和设施;同时,为加强水利工程管理,保证工程安全,提高效能,应规范管理单位的岗位设置和岗位定员。     

基于结构方程模型的乡村人居环境适宜性影响因素研究——以湖南省张谷英村为例

乡村人居环境适宜性研究一直是乡村建设的重要内容之一。以湖南省张谷英村为例,运用主成分分析法,从乡村自然环境与社会环境两个维度出发,构建了涵盖水资源状况、土地资源状况、基础设施、经济状况、交通状况、医疗卫生条件、建筑设施与安全管理状况8项指标变量及21个指标因子在内的乡村人居环境适宜性影响指标框架,并通过AMOS软件建立了乡村人居环境适宜性影响指标结构模型。研究结果表明:自然环境中的水资源状况与土地资源状况对乡村人居环境适宜性有正向影响,其中水资源状况指标变量对人居环境适宜性的影响力高于土地资源状况;社会环境中的6项指标变量对乡村人居环境适宜性均有正向影响,其中基础设施对乡村人居环境适宜性的影响程度最大,建筑设施与安全管理状况的影响程度最低。     

丽江西林瓦村纳西聚落美之要素研究

本文以云南丽江西林瓦村纳西聚落为研究对象。通过实地调研、案例分析、归纳总结等方法,分析其选址生聚、街道脉络、院落秩序、建筑造型、细部涵义诸方面对于生态之美、形式之美、生活之美的积极作用,提出院落组织的逻辑有序,因势相宜是纳西聚落之美的核心,是进一步研究和发扬的岀发点.     

城中村问题研究综述

城中村是我国城市化进程快速推进的产物,在我国众多的城市里＂四面开花＂,成为重要的城市问题之一。近年来,许多学者从不同的角度对城中村现象进行了分析和研究,本文从城中村的定义、特征、类型、研究角度、研究特点和趋势等方面对其相关的研究进行了综述。     

横塘村水文站代表线平均流速--断面平均流速相关分析

安吉县横塘村水文站是西苕溪区域代表站，该站的水位，流量等水文要素是西苕溪水利规划和综合治理的重要依据，测流方法的确定直接关系到水文资料的质量，本文对该站的代表线测流进行了相关分析，取得了可行性成果。     

地域文化视野下的乡村景观设计研究——以西井峪村为例

以地域文化为出发点,重新审视乡村景观设计的新时代意义。研究在乡村振兴战略背景下地域文化特色如何结合乡村景观设计进行更新与维护。通过实地走访调研的方法,记录并归纳乡村景观设计现状,以西井峪村作为落脚点,发现现存问题并提出相应更新策略,探索在新时代下更贴合地域文化、宜居宜观宜游的乡村景观。结合地域文化进行乡村景观设计,有效实现乡村景观优质发展,增强游客旅行体验,活化特色地域文化。