INFLUENCE OF REMOTE SENSING IMAGERY SOURCE ON QUANTIFICATION OF RIPARIAN LAND COVER/LAND USE1

ABSTRACT: This paper compares approaches to quantifying land cover/land use (LCLU) in riparian corridors of 23 watersheds in Oregon's Willamette Valley using color infrared aerial photography (AP) and Thematic Mapper (TM) imagery. For each imagery source, LCLU adjacent to stream networks were quantified across a range of lateral and longitudinal scales. Single‐date AP data had higher LCLU class accuracies than the multi‐date TM data, except for row crops. Correlations among LCLU classes for the two imagery sources increased with increased spatial extent. In general, LCLU proportions for AP and TM differed, but lateral/longitudinal patterns were similar. An aggregated vegetation class comprised of forest, shrub/scrub, and grass/forb was strongly associated with a fish index of biotic integrity (IBI) for both AP and TM data, although AP correlations were higher. Highest fish IBI correlations for both data sources were with the aggregated vegetation class close to the stream and for the longest longitudinal scales. The row crop class was strongly associated with stream nitrate for both data sources, although correlations for the TM data were higher. Stream nitrate correlations were strongest for the widest lateral and longest longitudinal scales. Overall, both single‐date AP and multi‐date TM imagery appear to have potential for use in estimating indicators of stream ecological condition.     

Presentation of ventriculomegaly at 11–14 weeks of gestation: An analysis of longitudinal data

Objectives

The aim of this study was to examine the value of the sonographic measurements of the choroid plexus and the lateral ventricles at 11–14 gestational weeks in fetuses that had the diagnosis of second-trimester ventriculomegaly (VM) as a clinical reference.

Methods

The standard axial plane used for biparietal diameter measurement from 2D stored images in the first trimester was used to calculate the ratio between the choroid plexus and lateral ventricle diameter (PDVDR), the choroid plexus and lateral ventricle length (PLVLR) and the choroid plexus and lateral ventricle area (PAVAR) in 100 normal and 15 fetuses diagnosed with second-trimester VM.

Results

In fetuses with VM, the measurements of PDVDR, PLVLR and PAVAR were all significantly smaller compared to normal fetuses (p = < 0.001, <0.001, <0.01). Four out of seven cases with mild VM had measurements below the 5th percentile (57%). 75% of cases with moderate or severe VM had at least one measurement below the 5th percentile.

Conclusions

Since the axial plane of the fetal head is obtained in all first-trimester routine screenings, the measurements of PDVDR, PLVLR and PAVAR could easily be integrated into routine examinations for an early detection of VM.     

Local Energy Policy and Smart Growth

The concluding document of the Rio conference in 1992, Agenda 21 for sustainable development, is implemented mainly at the local level in Germany. 'Sustainable development' is a model for the socially fair, economically competitive and ecologically viable development of the world. Local Agenda 21 (LA21) is a new municipal urban development process in which cities and their inhabitants orientate themselves to the model of sustainable development. Analysis of the LA21 process in Germany, and in particular that of the city of Osnabrück, shows deficits between the requirement of achieving sustainability and its practical realisation. Only a marginal development in the direction of sustainability has taken place. Concepts are lacking and the LA21 process is insufficiently integrated into conventional urban planning. Suggestions for the improvement of the LA21 process include the development of a concrete concept, together with the continuation of practical examples, the integration of four main areas (the environment, the social, the economy and the less developed world) and the strengthening of the popular themes in the LA21 process (such as climate protection and less developed countries' politics). El documento final de la conferencia de Rio en 1992 "La Agenda 21 para el desarrollo sostenible", es inplementado principalmente a nivel local en Alemania. "Desarrollo Sostenible" es una modelo para el desarrollo del mundo socialmente justo, ecónomicamente competitivo y ecológicamente viable. La "Agenda Local 21" es un nuevo proceso de desarrollo urbano municipal, en el cual las ciudades y sus habitantes se orientan hacia el modelo de desarrollo sostenible. El análisis del proceso de la Agenda Local 21 en Alemania y en particular el de la ciudad de Osnabrück muestra deficits entre el requerimiento de logro de sostenibilidad y su realización práctica. Solo un desarrollo marginal en la dirección de sostenibilidad ha sido llevado a cabo. Hay carencia de conceptos y el proceso de la Agenda Local 21 es insuficientemente integrado en la planeacio´n urbana convencional. Sugerencias para un mejoramiento del proceso de la AL 21 incluyen el desarrollo de un concepto concreto junto con la continuación de ejemplos practicos, integración de cuatro áreas principales (ambiental, social, económica, y el mundo menos desarrollado) y fortalecimiento de temas populares en el proceso de la AL 21 (tales como protección del clima y políticas de paises menos desarrollados).     

Assessing the organic composition of urban surface films using nuclear magnetic resonance spectroscopy

Recently it has been shown that urban surfaces are covered with a thin film which mediates the fate, distribution and accumulation of semi-volatile organic compounds in the environment. In this study we apply a combination of solution, semi-solids, and solid state nuclear magnetic resonance (NMR) methods to provide a general overview of the organic constituents. In surface film collected from 30 m2 of outside windows over an area of 12 km2 in downtown Toronto, we roughly estimate that the organic carbon is approximately 35% carbohydrate, approximately 35% aliphatics, approximately 20% aromatics, and approximately 10% carbonyl groups. Various aliphatic groups can be identified including a number of acids, alcohols, alkanes, and alkenes. Also, numerous intact aliphatic esters are apparent that have not been observed before, as well as carbohydrates. The aromatic species include a small portion that appears to be derived from a polymer of styrene, in addition a larger fraction is consistent with polyhydroxylated PAH derived material, although this assignment is tentative and based solely on 1-D NMR data only. In addition, signals from polybutadiene are present and while accurate quantification is not possible, it appears that this polymer may be up to a few percents by weight of the total organic material.