唐山市概况和灾害潜势分析

本文概述了唐山市的基本情况及其经受的自然灾害和发展趋势,这些内容为制定唐山市综合减灾规划的前提和基础。     

国外减轻城市洪涝灾害新设施发展综述

近二十多年国外在减轻城市洪涝灾害设施方面发展很快,建造了各种新型的抑制暴雨径流的设施,可分为流域雨水贮留设施和流域雨水渗透设施两大类,本文主要介绍目前国外已经建成和计划兴建的这些设施的型式、规划设计步骤、引起的问题和管理维护方法,以及在我国发展这些设施的必要和可能。     

Scientist and policy-maker response types and times in suburban watersheds

Differences between scientist and policy-maker response types and times, or the “how” and “when” of action, constrain effective water resource management in suburbanizing watersheds. Policy-makers are often rushed to find a single policy that can be applied across an entire, homogeneous, geopolitical region, whereas scientists undertake multiyear research projects to appreciate the complex interactions occurring within heterogeneous catchments. As a result, watershed management is often practiced with science and policy out of synch. Meanwhile, development pressures in suburban watersheds create changes in the social and physical fabric and pose a moving target for science and policy. Recent and anticipated advances in the scientific understanding of urbanized catchment hydrology and pollutant transport suggest that management should become increasingly sensitive to spatial heterogeneities in watershed features, such as soil types, terrain slopes, and seasonal watertable profiles. Toward this end, policy-makers should encourage funding scientific research that characterizes the impacts of these watershed heterogeneities within a geopolitical zoning and development framework.     

重庆市耕地资源可持续利用研究

分析了重庆市耕地资源利用现状、利用中存在的主要问题及其产生的原因 ,提出了重庆市耕地资源可持续利用的相应对策。     

城郊旅游的潜在市场特征及产品开发--以合肥市为例

城市郊区已成为旅游的热点区域,合肥市对行政区域进行划分后,正着手大力开发城郊旅游.为了使合肥城郊旅游业的发展更具科学性,在实地调查基础上,分析了合肥城郊旅游潜在的市场特征,得出其城郊旅游开发市场潜力巨大;在分析外来旅游者及市民的城郊旅游意向基础上探讨了合肥城郊旅游产品开发,认为新城郊区旅游功能可定位为水上休闲度假娱乐中心和生态农业观光园区;最后提出合肥城郊旅游科学开发的几点建议.     

扬州市生态旅游发展战略的研究

分析扬州市旅游业发展的优势和劣势，论述并评价扬州市主要的生态旅游资源，进行扬州市生态旅游发展的功能分区与项目策划，提出实施扬州市生态旅游发展战略的对策及措施。     

AFTER THE 1993 FLOOD: A WATER AND SURFICIAL BED SEDIMENT QUALITY SCENARIO ON THE ILLINOIS AND UPPER MISSISSIPPI RWERS1

ABSTRACT: Effects of the 1993 flood on river water and sediment quality were investigated using historical data and data collected from the Illinois River and Upper Mississippi River in a post‐flood period. Overall the post‐flood results showed systematic reductions and individual changes in the water and sediment constituents. The reductions in sediment metals and nutrients were most obvious at the Keokuk and Lock and Dam 26 stations. By analyzing and comparing the physical changes to the changes in water and sediment constituents at each station, it was found that physical processes such as sediment entrainment and, more importantly, the removal of fine sediment to be the main causes for the reduced concentrations in sediment constituents. On the other hand, sediment redistribution and associated secondary contamination could have caused the emergence of several water and sediment constituents that were undetected before the flood.     

长江三角洲地区耕地质量变化的初步研究——以锡山市为例

长江三角洲地区耕地质量变化的监测是区土地可持续利用研究的重点领域。锡山市位于太湖平原北部，其耕地质量变化过程反映了长江三角洲腹地经济发展水平较高地区的耕地现状和发展趋势。本研究以锡山市为典型区，依据第二次土壤普查资料，多年土壤监测数据和有关耕地系统状态的统计数据，结合研究区耕地状况的调查分析，提出了支持压力－状态－响应模型的耕地质量评价指标体系，并据此指标体系分析了该区耕地质量变化趋势。结果表明，该区耕地系统的发展总体上是可控的、有序的、但是耕地系统产出能力的稳定性呈下降趋势，系统高水平投入的维持面临较大的压力。鉴于人口增加和耕地持续减少的态势在很长一段时间内难以逆转，耕地占补的质量差异因素，是该区能否实现耕地总量动态平衡的关键所在。     

丽江古城水环境现状与调控对策研究

水环境是丽江世界文化遗产地生态地质环境的重要组成部分。由于丽江城市化进程加快，对水环境保护不力，导致古城水污染加剧、水资源量衰减、景观生态用水不足和景观水质下降。通过强化水环境研究，加强水环境立法，进行水生态环境综合治理；实施以调剂古城周边地下泉水为主，拉市海调水为辅的丽江古城景观调水方案，可保护丽江古城水环境，为丽江古城世界文化遗产地的可持续发展提供保证。     

综合开发儋州市农业资源的建议

本文结合儋州市第二期农业综合开发的实践，客观地总结了该市所取得的成绩，较详细地剖析了成功的原因，并提出了综合开发儋州市农业的建议．