功能区排放负荷污染系数百分比分配法研究

在考虑了总量控制区风频、风速和各功能区位置及污染源“影响范围”等影响因素的条件下，提出了“平均下风距离”的概念，从而建立了一种更为科学、合理的总量控制区内功能区排放负荷分配新方法。通过与 总量控制A值法所提出的面积分配方法相比较，验证了新方法的合理性和有效性。     

城市适度人口分析方法及其应用

考虑资源承载力 (R)和生活舒适度 (S)对适度人口的影响 ,以不同经济发展水平下的人口现状为依据 ,提出R S双向寻优方法进行城市适度人口分析 .并以广州市为例 ,寻求其最优人口容量 .结果表明 ,现有资源承载力与经济水平下的广州人口规模略高于适度人口规模 ,需要进行人口与经济密度的重新布局 .     

对中国城市环境地质工作的思考

本文回顾了国内外城市地质工作的发展历程，阐述了中国城市地质工人的发展方向和重点工作领域。指出城市地质工作必须服务于城市（城市群，经济开发区）的规划，建设和管理，为城市社会经济可持续发展，减灾防灾提供具有针对性，实用性和超前性的基础地质资料和成果。由于中国城市的规模，性质，自然资源承载力，地质环境特征不同，城市环境地质调查，评价的对象，内容也将有所差异。归纳起来，城市地质的重点工作领域为：城市可持续发展，城市可持续发展的资源开发战略与对策，城市地质环境容量及脆弱性分析。城市地质灾害：城市地质灾害风险，影响面，易损性及对灾害的反应，城市环境变化的地质指标体系，城市环境地质综合研究：城市环境地质调查评价的新理论，新方法，新技术，城市环境地质图纱的编制。数字城市环境地质：GIS平台上的地质空间数据库，城市地质环境动态分析，评价，决策系统和地质灾害预警预报系统。     

海南岛水稻气候生产潜力和人口承载量的估算

本文从海南岛自然优势出发,采用联合国粮农组织《产量与水的关系》中介绍的气候生产潜力的农业生态方法: 计算了海南水稻的气候生产潜力,从海南岛水稻生产和人口的现状出发,采用灰色系统中的GM(1,1)预测模型:计算和探讨了当前和未来水稻生产的人口承载量问题。试图揭示水稻生产的现状、问题和发展前景,为全岛水稻的产、销、购提供科学依据。     

土地资源承载力若干问题浅析

本文就当前土地资源承载力研究中所遇到的若干问题,从土地资源承载力定义的理解、土地生产力的计算、单产预测、土地资源评价和土地利用结构调整等5个方面进行了探讨。 如何定义和理解土地资源人口承载力是进行这项研究的关键。以研究土地资源人口承载力为目的的土地资源评价是进行土地生产力计算和土地利用结构调整必不可少的基础。根据统计资料预测的作物单产,不能反映出土地生产力,而使用农业生态地带法计算作物单产目前也存在着一些问题。     

Influence of no-tillage on the distribution and lability of phosphorus in Finnish clay soils

No-tillage (NT) is a method adopted to reduce erosion and particulate phosphorus (P) load from arable land to watercourses. However, it has been found to increase the loss of dissolved P with surface runoff, but the reasons for that have rarely been examined in detail. The objective of the present study was to determine the chemical factors explaining this response by investigating the impact of NT on the type and distribution of P reserves as well as on organic carbon (C) in the 0–35 cm topsoil layer of clay soil profiles (Vertic Cambisols). Soil samples were taken from two experimental fields (Jokioinen and Aurajoki) at 0–5, 5–20 and 20–35 cm depths in conventionally tilled (CT) and non-tilled (for 4–5 years) plots. The plots had been cultivated and fertilized according to the common field practices in Finland (15–18 kg P and 100–128 kg N ha⁻¹ year⁻¹).Inorganic and organic P reserves characterized by a modified Chang and Jackson fractionation procedure were not significantly affected by the cultivation methods. However, in the uppermost soil layer (0–5 cm) in NT of the Jokioinen field, the labile P determined by water extraction (P_w) increased significantly, whereas the increase in P extracted with acid ammonium acetate (P_AAC) remained statistically insignificant. The increase in labile P coincided with a significant increase in organic carbon (C), which supports the theory that competition between organic anions and phosphate for the same sorption sites on oxide surfaces will enhance the lability of soil P. In the Aurajoki field with distinct soil cracking, P_w and P_AAC were not affected by NT in the uppermost soil layer, but they increased in the deepest soil layer (20–35 cm) concomitantly with an increase in Al-bound P and organic C. However, the increases were not statistically significant. In both fields, soil acidification due to the repeated application of N fertilizers at a shallow soil depth as well as the accumulation of organic C lowered pH of the uppermost soil layer in NT compared to the deeper soil layers. The results indicated that even short-term NT can increase the labile P in clay soil. However, further studies are needed to assess the long-term changes in lability of surface soil P and, consequently, the possible need for readjustment of the fertilization level in NT.     

沈阳市中水回用对策研究及前景分析

为了解决全市水资源严重短缺问题，缓解污水排放对生态环境造成的破坏，沈阳市在今后5～10a内将建成中水回用系统，使城市中水回用率达到50％。结合沈阳市中水回用现状，分析了目前全市中水供应能力及市场需求，进行了2010年相应指标的预测，同时探讨了沈阳市中水回用存在的问题和解决方法。     

环境承载力与环境扶贫

随着人类环境意识的觉醒与升华，引发了对自身生存环境的更深层次的思考。本文就环境承载力的内涵与外延以及它既会造成贫困又可解脱贫困的关键作用进行了研究和探讨。     

黄山风景区物质容量研究

系统地分析了旅游区物质容量与其子容量之间的关系,根据黄山区风景区客流空间负荷特点,认为北海游览区是黄山风景区物质容量的“瓶照”最低水桶板原则,合理计算了黄山风景区物质容量;详细探讨了扩大黄山风景区物质容量的若干途径。     

总量控制下环境容量产权交易及政府行为分析

利用经济学的原理，本文分析了环境容量的经济特点(不是环境容量产权交易的特征)，提出了环境容量产权交易的可行性和必要性。同时针对政府在环境容量产权交易中的作用进行了必要的分析。