Reference conditions Sample Clauses

Reference conditions. 3.05 Scope of reference conditions: Surface water type-specific
Sample 1
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Reference conditions. ‌ The first step to build a fish-based index is the agreement on reference conditions (RC). Following the Guidance: “High status or Reference Conditions should reflect a state in the present or in the past corresponding to very low pressure, without the effects of major industrialisation, urbanisation and intensification of agriculture, and with only very minor modification of physico-chemistry, hydromorphology and biology». They could be determined from existing sites, from models, from paleolimnological reconstructions, from expert judgement or from some combination of these (WFD; 2000/60/EC). In this study, reference conditions were obtained from two different ways: - Reference sites (88 natural lakes) identified during the intercalibration process, with general reference thresholds established on the level of anthropogenic pressure and proved by expert judgement (depending on their relevance for the lake ecosystem), and - Hindasting approach where reference conditions are set to establish a “natural trophic state” by modelling. Approach based on reference sites During the intercalibration process, a set of reference criteria and thresholds with no or minor human impact on the environment was performed (Table.6). A total of 88 sites appeared, distributed among member state as following (table 7). Once the reference model build (on reference sites), it is applied on all sites (reference+ disturbed) to get the reference conditions (Figure.5a), i.e. values that disturbed sites should get if they were in reference. Table.6 List of criteria and reference conditions established in Ranco by all member states in Europe. Criteria Thresholds Eutrophication % land use « natural » >80% or class 1 (Rejection threshold = 70%) Population density 10 hab.km-2 or class 1 (Rejection threshold at 30hab/km²) Ptot (µg/l) 20 (Rejection threshold at 50µg/l) Acidification pH > 6 & if <6 : expert jugement Hydromorphology Impoundment upstream Expert judgment Loss of connectivity downstream Expert judgment Water level fluctuation Expert judgment Shoreline Bank modification Expert judgment Activity on the lake Urbans/industrials discharge Expert judgment Stocking Expert judgment Biological or chemical manipulation Expert judgment Fishing activities Expert judgment Others activities Expert judgment Table.7 Number of reference lakes among the 419 lakes of the dataset. MS Reference IC Estonia 6 Finland 27 Ireland 1 Sweden 38 France 5 Germany 11 This method was truly criticized because...
Sample 1

Related to Reference conditions

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  • Safe Conditions Whenever an employee reports a condition which the employee feels represents a violation of safety or health rules and regulations or which is an unreasonable hazard to persons or property, such conditions shall be promptly investigated. The appropriate administrator shall reply to the concern, in writing, if the employee's concern is communicated in writing.

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  • Unsafe Conditions In accordance with 29 CFR § 1977, occasions might arise when an employee is confronted with a choice between not performing assigned tasks or subjecting himself/herself to serious injury or death arising from a hazardous condition at the workplace. If the employee, with no reasonable alternative, refuses in good faith to expose himself/herself to the dangerous condition, he/she would be protected against subsequent discrimination. The condition causing the employee's apprehension of death or injury must be of such a nature that a reasonable person, under the circumstances then confronting the employee, would conclude that there is a real danger of death or serious injury and that there is insufficient time, due to the urgency of the situation, to eliminate the danger by resorting to regular statutory enforcement channels. In addition, in such circumstances, the employee, where possible, must also have sought from his Employer, and been unable to obtain, a correction of the dangerous condition.

  • Contract Conditions This section contains conditions which shall be complied with during the performance of this contract. The conditions come in two parts, general conditions and special contract requirements.

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