大安古河道区的渔业开发利用

吉林省西部大安古河道区是松辽平原农业综合开发的重点区域之一．在对古河道区域内的渔业资源进行全面调查的基础上,本文初步探讨了区域内各类渔业资源的开发利用途径．     

论城市气象灾害及防治对策

依据国内外城市气候的观测资料和分析研究文献，从合理利用城市气候资源和防灾减灾角度，首次论述了城市气象灾害种类（公共、特定和相关三大类9种）以及防治对策。     

建筑装饰材料的防火分级与评估原理

随着建材工业的发展,新型复合材料日益增多,如何科学地确定复合材料的燃烧性能等级,是应予解决的问题。本文作为该论题的第一部分工作,首先从理论上阐述了分级的依据及今后工作的方向。     

流域性洪涝及其指标研究

本文讨论了区域洪涝指标，认为区域洪涝指标应反映出不同洪涝面积和不同洪涝等级对区域洪涝的影响程度，基于这一思想，提出了一个区域洪涝指标计算公式。为了使区域洪涝研究更为具体和可比，本文在分析区域洪涝指标的基础上，提出了流域性洪涝的概念，并以《中国近五年百旱涝分布图集》为基础，建立了淮河流域５００年流性洪涝指标序列及其等级。     

DIFFERENCES BETWEEN MODELED SURPLUS AND USGS-MEASURED DISCHARGE IN LAKE PONTCHARTRAIN BASIN,LOUISIANA1

ABSTRACT: A one-layer decreasing-availability monthly water balance model is used to estimate monthly surplus that flows into the Lake Pontchartrain Basin from the Amite, Tickfaw, Natalbany, Tangipahoa, and Tchefuncte Rivers for water years 1949 through 1990. The modeled annual surplus for each drainage basin is compared to gauged annual discharge obtained from the United States Geological Survey. This provides an estimate of the differential success of the model over watersheds of various sizes, and also suggests appropriate adjustment factors to be used in future water balance analyses of similar basins in humid subtropical climate regions. Results show that annual surplus values agree well with the USGS values, after an annual adjustment of about 140 mm (11 to 28 percent of the basin surplus) is subtracted from the annual modeled totals to compensate for overestimation by the model. However, inter-annual variability is high in the annual cycles. Winter and spring discharges can also be modeled successfully.     

THE CHUBB/BAUMAN METHOD FOR ESTIMATING THE RECREATION POTENTIAL OF RIVERS: A CRITICAL REVIEW1

ABSTRACT: The Chubb/Bauman (Ch/B) method for making quantitative estimates of recreation potential for rivers is based on the 1968/ 69 Leopold method for quantitative assessment of the scenic beauty of rivers. Both use classifications of environmental variables as the database. Unlike the Leopold method, the classifications used in the Ch/B method consistently reflect human preferences. The Ch/B method collects information on 67 variables, and uses a computer program to produce estimates of potential for 16 common recreation activities. This critique evaluates selected concepts and procedures of the Ch/B method partly by comparison with other available methods of recreation resource inventory. It considers the validity and utility of numerical weighting of variables, the use of numbers derived from place in a classification, and the transformation process. The quantitative techniques of the method exhibit serious flaws. Much of the data produced by the method appears to be quantitative but in fact is not, and it does not produce truly quantitative estimates of recreation potential. Classifications of generalized geographic or environmental variables are shown to have serious defects as a basis for evaluation of recreational potential.     

FLOWING WATER RESOURCES1

Using data related to stream order and the morphological characteristics associated with streams of different discharge rates, an estimate of the river resources of the United States is made. The national totals are: 3,200,000 miles total length of rivers; 15,000 square miles of river surface; and 29 cubic miles of water stored in river channels. Using the same techniques, more exact estimates may be made for individual river basins. Suggestions are given for application of the techniques and river data in the management of water resources.     

新疆河流径流特征分析

选择了新疆众多河流中代表性好的7条河流，对径流的特征进行了分析。结果表明，新疆河流径流量主要集中在夏季，占年径流量的50．8％—70．7％，春、秋季径流量差别不大，冬季仅占年径流量的4．7％—10．8％。以7条河流径流深值可看出，北疆径流深值比南疆大，最大的是布尔津河，径流深为507．4mm。从径流量的Cv值看，除头道沟为0．44，极值比4．42较大外，其它河流的Cv值均在0．19—0．23间、极值比在1．85—2．42间。同时，新疆大多数河流径流量90年代后有明显增多的趋势。     

Disaster Management for Nandira Watershed District Angul (Orissa) India, Using Temporal Remote Sensing Data and Gis

NALCO – the largest exporter of aluminium in India has a power plant of 720 MW capacity in Nandira watershed in Angul district of Orissa. The power plant utilises local coal to generate thermal power and disposes of large amount of ash which accumulates in slurry form at nearby two ash ponds. These ash ponds were breached on 31 December 2000, causing ash accumulation for entire regime of the Nandira river. An attempt has been made towards preparation of recovery and rehabilitation plan for NALCO using temporal Remote Sensing data and GIS. Indian remote sensing satellite data for pre-breach condition 12 December 2000, during breach event 31 December 2000 and post-breach condition 4 and 6 January 2001 has been digitally analysed for Nandira watershed. The satellite data of coarse spatial resolution provides the absence and presence of fresh sediment deposition along Nandira watershed and Brahmani river pertaining to pre-breach and post-breach conditions respectively on regional scales. The temporal comparison of fine resolution has clearly highlighted the aerial extent of damage caused by the disaster for entire watershed on local scales. The GIS has helped in demarcation of freshly accumulated ash at interval of 500 m along the river length as well as in delineation of maximum ash accumulation across the river width. The study has clearly demonstrated the use of temporal Remote Sensing data in conjunction with GIS for disaster management in terms of recovery and rehabilitation plan preparation of the Nandira watershed.     

南通濠河水体中非离子氨的动态变化分析

分析了濠河水体中非离子氨在不同断面、不同月份、不同年际的变化情况 ,并指出其超标的原因及控制措施