NECESSARY THOUGHTS AND METHODS TO SOLVE THE PROBLEMS OF "LAND IMPROVEMENT PROJECT IN THE LOWER CHIKUGO RIVER" : A study on water control system and conservation of water environment in the creek region on the Ariake coast

An automated shower water control system has been implemented to reduce the volume and variability of weak black liquor being sent from the pulp mill to the evaporators. The washing controls attempt to balance the need for consistent and low soda carryover to the bleach plant with consistently high weak black liquor solids being sent to the evaporators. The washer controls were implemented on two bleachable grade hardwood lines (one with oxygen delignification, one without oxygen delignification) and one pine line. Implementation of the control program resulted in an increase in black liquor solids of 0.6 percentage points for the hardwood lines. Significant foam reduction was realized on the pine line since the pine black liquor solids were able to be consistently maintained just below the soap separation point. Low black liquor solids excursions to the evaporators were eliminated. Bleach plant carryover was stabilized and no negative impact on chemical consumption was noticed when controlling weak black liquor solids to recovery.

Download Full-text

Nutrient Input and Trophic Status of the “Neue Donau”, a High-Water Control System along the River Danube in Vienna, Austria

Water Science & Technology ◽

10.2166/wst.1990.0021 ◽

1990 ◽

Vol 22 (5) ◽

pp. 137-144 ◽

Cited By ~ 3

Author(s):

M. T. Dokulil ◽

G. A. Janauer

Keyword(s):

Water Quality ◽

Control System ◽

Trophic Status ◽

High Water ◽

Nutrient Concentrations ◽

Nutrient Input ◽

Water Control ◽

Trophic Conditions ◽

River Danube ◽

High Nutrient

The system “Neue Donau” functions as a control system for high waters of the river Danube and is an important recreational area for many people. Water quality and trophic status of the water body is thereforeof prime importance. The high nutrient concentrations of the river Danube (P-tot 238±41µg/l, N-tot 2.53±0.78 mg/l) reach the system via groundwater seepage. Present conditions in the basin of Neue Donau are,as a result of this nutrient in-flux,eutrophic to hypertrophic. Average values during the summer period have declined from 366 µg/l total phosphorus to 78 µg/l, and from 86 µg/l chlorophyll-a tol7µg/l between the years 1985 and 1988. However, a dam which is planned in the river at Vienna will permanently raise the water level of the river thus increasing the the groundwater flow in the direction to the Neue Donau and therefore the nutrient input which will enhance trophic conditions in the impoundment. Since macrophytes play an important role in one part of the system macrophyte management together with measures along the river are some of the suggested strategies to keep the system Neue Donau at acceptable trophic conditions and good water quality.

Download Full-text

IoT based Smart Water Control System for Home Grown Plants

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2019.9145 ◽

2019 ◽

Vol 7 (9) ◽

pp. 1018-1022

Author(s):

Shaista Anjum

Keyword(s):

Control System ◽

Water Control ◽

Smart Water

Download Full-text

The Application of Sheet Steel Piles Combined with Soil-Cement Piles to Stabilize a Deep Excavation Pit’s Wall

Journal of Southwest Jiaotong University ◽

10.35741/issn.0258-2724.55.4.13 ◽

2020 ◽

Vol 55 (4) ◽

Author(s):

Nguyen Anh Tuan ◽

Nguyen Thanh Dat ◽

Nguyen Duc Anh

Keyword(s):

Construction Projects ◽

Sheet Steel ◽

Water Environment ◽

Horizontal Displacement ◽

Simulation Software ◽

Deep Excavation ◽

Improvement Project ◽

Soil Cement ◽

Steel Piles ◽

City Water

In recent years, owing to advances in technology, excavation pits have shown increased improvements. Taking advantage of advanced solutions combined with traditional ones has brought about considerable advantages for construction contractors and saves on expenses to carry out construction projects. Owing to their ability to analyze geotechnical problems, several calculation and simulation software, such as Plaxis, Bentley, along with many others, have grown in popularity. Among them, Midas is one such software, which is a set of solutions developed by the MIDAS IT company and is widely applied in many constructions. The authors evaluated the ability to use Midas software to calculate the stability of a wall in a deep excavation pit for the Ho Chi Minh City Water Environment Improvement Project. The results of these researches reveal that combining soil-cement piles and sheet steel piles decreases the internal forces in sheet steel pile walls. At the same time, this solution not only reduces horizontal displacement but also keeps the settlement of the soil around the excavation pit within the permissible range, which helps to ensure that the adjacent pavements are stable and will not crack. The results of this study can be applied to similar geological constructions.

Download Full-text

Archaeological Operations

Water, Cacao, and The Early Maya of Chocóla ◽

10.5744/florida/9780813056746.003.0004 ◽

2018 ◽

pp. 126-193

Author(s):

Jonathan Kaplan ◽

Federico Paredes Umaña

Keyword(s):

Control System ◽

Hierarchical Structure ◽

Field Data ◽

The South ◽

Water Control ◽

Long Distance ◽

The North ◽

Ancient Society ◽

Preclassic Period

Chapter 4 abstracts and summarizes the very copious field data from the three lengthy field seasons at Chocolá, including the specific evidence obtained about the very extensive water control system that was discovered. Intensive grid excavations were undertaken in five operations: Mound 15, the northernmost part of the elite north sector, Mounds 6 and 7, in the southern part of the north sector, Mound 2, in the central administrative sector, and Mound 5, in the south sector. Accordingly, our three field seasons provide the specific evidence and artifacts we have been able to use to understand the clearly hierarchical structure of the ancient society and city. Of particular importance for a better understanding of the material underpinnings of Chocolá is our research at Mound 5, in the south, where we believe cacao arboriculture was developed for long-distance trade in the Preclassic period.

Download Full-text