Metabolism Regimes in Regulated Rivers of the Illinois River Basin, USA

Abstract Metabolism estimates organic carbon accumulation by primary productivity and removal by respiration. In rivers it is relevant to assessing trophic status and threats to river health such as hypoxia as well as greenhouse gas fluxes. We estimated metabolism in 17 rivers of the Illinois River basin (IRB) for a total of 15,176 days, or an average of 2.5 years per site. Daily estimates of gross primary productivity (GPP), ecosystem respiration (ER), net ecosystem productivity (NEP), and the air-water gas exchange rate constant (K600) are reported, along with ancillary data such as river temperature and saturated dissolved oxygen concentration, barometric pressure, and river depth and discharge. Workflows for metabolism estimation and quality assurance are described including a new method for estimating river depth. IRB rivers are dominantly heterotrophic; however, autotrophy was common in river locations coinciding with reported harmful algal blooms (HABs) events. Metabolism of these regulated Midwestern U.S. rivers can help assess the causes and consequences of excessive algal blooms in rivers and their role in river ecological health

A systems study on the sullair parts and service maintenance department of Pneumatic Technologies, Inc.

Executive Summary. Pneumatic Technologies Incorporated was founded by a group of engineers geared towards the distribution of air compressors. Currently, the company handles 3 lines. All parts and units of these air compressors are ordered from suppliers abroad. The Sullair line of air compressors take the bulk of the share of sales and is the only ones stocked. Thus, the study will be focused on the SULLAR PARTS AND SERVICE MAINTENANCE DEPARTMENT. All activities from the reception of fast moving inventory up to its release will be taken into consideration. The time period for the system\u27s study will be from January 2000-September 2001. Presently the system has four fast moving parts namely the air filter element, lubricant, separator element and fluid filter element. After thorough analysis, it was observed that the inventory management of the system has discrepancies due to the excess in allowable backorders