苏州河底泥对上复水水质污染影响

研究了上海市苏州河底泥中有机物及营养盐释放对上复水水质的影响,分析了微生物与底栖生物底泥再悬浮对底泥释放过程的影响。研究表明,底泥中化学需氧量与水体中的化学需氧量成正比,底泥中生化需氧量与水体中的生化需氧量呈正比,再悬浮促进底泥中污染物向上复水体释放。底泥SOD与水体中DO成正比,底泥污染是影响苏州河水质的重要因素;对苏州河底泥进行疏浚工程可较好地提高水体中溶解氧的浓度、降低化学需氧量、生化需氧量及氨氮的浓度。     

沪苏边缘区经济合作的时空关系及其对策 --以南通和苏州为例

沪苏边缘区是沪苏经济联系较为密切的区域.以江苏省的南通和苏州两市为研究对象,首先对沪苏边缘区经济合作进展的时空关系进行了总结,时间上表现为三个阶段的历史演进,空间上表现为合作的地区性差异.接着,分析了沪苏边缘区经济合作地区性差异的主要原因,包括经济距离、思想观念和投资环境的差异.在此基础上,对沪苏边缘区的合作绩效进行了评价,认为沪苏边缘区合作绩效明显,合作的方向是经济一体化.基于对北美自由贸易区、欧盟和APEC三个典型的区域合作组织模式的成功经验的对比分析,最后提出了进一步推进沪苏边缘区合作的对策.     

苏州国际旅游节的SWOT分析及对策研究

旅游节庆活动被看作是“开放经济”的一张亮丽名片，对丰富旅游产品、提升城市整体形象、促进经济和社会事业发展具有积极的推动作用，因此日益受到城市管理者和学术界的关注。苏州国际旅游节作为苏州城市旅游产品的重要组成部分，是近年来苏州旅游产品结构调整的关键环节。运用SWOT对其进行了分析，探讨了今后的发展对策。     

HYDROLOGY OF A DRAINED FORESTED POCOSIN WATERSHED1

ABSTRACT: In order to assess the effects. of silvicultural and drainage practices on water quality it is necessary to understand their impacts on hydrology. The hydrology of a 340 ha artificially drained forested watershed in eastern North Carolina was studied for a five-year period (1988–92). Effects of soils, beds and changes in vegetation on water table depth, evapotranspiration (ET) and drainage outflows were analyzed. Total annual outflows from the watershed varied from 29 percent of the rainfall during the driest year (1990) when mostly mature trees were present to as much as 53 percent during a year of normal rainfall (1992) after about a third of the trees were harvested. Annual ET from the watershed, calculated as the difference between annual rainfall and outflow, varied from 76 percent of the calculated potential ET for a dry year to as much as 99 percent for a wet year. Average estimated ET was 58 percent of rainfall for the five-year period. Flow rates per unit area were consistently higher from a smaller harvested block (Block B - 82 ha) of the watershed than from the watershed as a whole. This is likely due to time lags, as drainage water flows through the ditch-canal network in the watershed, and to timber harvesting of the smaller gaged block.     

Riparian vegetation instream flow requirements: A case study from a diverted stream in the Eastern Sierra Nevada,California, USA

A methodology is described that allows determination of instream flow requirements for maintenance of riparian trees. Tree-ring data revealed strong relationships between tree growth and stream flow volume for riparian species at Rush Creek, an alluvial stream within an arid setting; these relationships allowed development of models that predict growth rates from hydrologic variables. The models can be used to assess instream flow requirements under the assumption that certain levels of growth are necessary to maintain the population. There is a critical need for development and use of instream flow methodologies for riparian vegetation, since present methodologies focus on needs of aquatic animals (e.g., fish) and may underestimate needs of the entire riparian ecosystem.     

BASINWIDE WATER-BALANCE MODELING WITH EMPHASIS ON SPATIAL DISTRIBUTION OF GROUND WATER RECHARGE1

ABSTRACT: A detailed but simple hydrologic budget for the entire Rattlesnake Creek basin (3,768 km²) in south-central Kansas was developed. With this budget, using minimal daily-weather input data and the soil-plant-water system-analysis methodology, we were able to characterize the spatial distribution of the hydrologic components of the water balance within the basin. A combination of classification and meteorological methods resulted in a basinwide integration methodology. Using this methodology, we found that, in addition to obvious climatic controls, soil, vegetation, and land-use factors also exert considerable influence on the water balance of the area. The available-water capacity (AWC) of soil profiles plays a dominant role in soil-water-deficit development and deep drainage. Vegetation and dryland or irrigated farming particularly affect the evapotranspiration (ET) components, with ET from irrigated corn and alfalfa being two to three times that from wheat. Deep drainage from irrigated wheat fields was found to be significantly higher than that from grassland and dryland wheat; deep drainage from alfalfa is practically nonexistent. We demonstrated how vegetation changes may affect components of the hydrologic cycle. We also showed that different portions of the watershed have different water-balance components and that use of single average values of hydrologic variables in management practices may not be realistic.     

苏州市域生态环境的演变、评价与功能分区

文章探讨了改革开放以来苏州市域生态环境的演变，并对其生态环境的质量进行了评价，最后针对苏州市域的环境状况对其进行了合理的功能分区，提出了相应的治理对策.     

苏州高新区静脉产业循环经济发展的对策

以循环经济3R原则的理念,剖析了苏州高新区静脉产业存在的问题。深入分析了苏州高新区静脉产业发展循环经济的对策。为其按循环经济的规律运行作了有益的探索,也为其循环经济的顺利开展提供了科学依据。     

综合调水前后苏州河下游水体耗氧特性比较

对综合调水前后的苏州河（北新泾下游）水体耗氧特性进行了定性与定量比较。结果表明，综合调水工程全面实施后，苏州河下游水体的还原性物质耗氧阶段消失，单位水体耗氧量大幅度下降，但难降解有机物阶段的耗氧量仍较高。耗氧动力学模拟计算表明，CBOD耗氧一级反应动力学速率常数（K）在综合调水前后变化不大，而硝化耗氧Logistic动力学速率常数（Kn-log)则明显提高。     

苏州河水体黑臭机理及底质再悬浮对水体的影响

探讨了苏州河水体黑臭现象，证实了水体发黑主要与存在吸附了ＴｅＳ的带负电胶体悬浮颗粒有关，且腐殖质是吸附物或络合物的主要组成。水体发臭为含硫，氮等有机物降解时逸出ＮＨ３、Ｈ２Ｓ等所致。