scholarly journals The Effect of Timber Harvesting on Fluctuation of Peat Water Level and Subsidence of Peat-Soil Surface

2019 ◽  
Vol 6 (2) ◽  
pp. 74
Author(s):  
Sona Suhartana ◽  
Yuniawati Yuniawati
Keyword(s):  
Water Level ◽  
Peat Soil ◽  
Drainage System ◽  
Soil Surface ◽  
Timber Harvesting ◽  
Water Level Fluctuations ◽  
Timber Production ◽  
Forest Plantation ◽  
Harvesting Techniques ◽  
Soil Compactness

<p>A goal of timber harvesting is to increase timber production through removing the timber  from the forest using some harvesting techniques.  A peatland is a fragile ecosystem and may degraded easily. Logging activities may adversely affect the soil compactness that disrupt the peat drainage system as well as cause subsidence, then ultimately may cause the sustainability of peat.  This study was focused on examining the effect of timber harvesting acivities in peat forest plantation.  The peatland damage may in the form of increased bulk density, water level fluctuations of peat (TMA), subsidence, irreversible and carbon emissions.  The objective of the  study is to find out the effect of timber harvesting in peatland plantations to peat water fluctuations and subsidence.  The results showed that logging activites caused : (1) The average of water table and water level are about 1.03 and 0.967 m; and (2) Subsidence about -8 to -12.5 cm with the average is -11.0 cm. </p>

scholarly journals Diurnal fluctuations in borehole water levels: configuration of the drainage system beneath Bench Glacier, Alaska, USA

2008 ◽  
Vol 54 (185) ◽  
pp. 297-306 ◽  
Author(s):  
T.J. Fudge ◽  
Neil F. Humphrey ◽  
Joel T. Harper ◽  
W. Tad Pfeffer
Keyword(s):  
Water Level ◽  
Numerical Test ◽  
Drainage System ◽  
Water Levels ◽  
Water Level Fluctuations ◽  
Diurnal Changes ◽  
Ablation Area ◽  
Orthogonal Grid ◽  
Borehole Water ◽  
Diurnal Fluctuations

AbstractWater levels were measured in boreholes spaced along the entire length of Bench Glacier, Alaska, USA, for a period in excess of 2 years. Instrumented boreholes were arranged as nine pairs along the center line of the glacier and an orthogonal grid of 16 boreholes in a 3600 m2 region at the center of the ablation area. Diurnal fluctuations of the water levels were found to be restricted to the late melt season. Pairs of boreholes spaced along the length of the ablation area often exhibited similar fluctuations and diurnal changes in water levels. Three distinct and independent types of diurnal fluctuations in water level were observed in clusters of boreholes within the grid of boreholes. Head gradients suggest water did not flow between clusters, and a single tunnel connecting the boreholes could not explain the observed pattern of diurnal water-level fluctuations. Inter-borehole and borehole-cluster connectivity suggests the cross-glacier width of influence of a segment of the drainage system connected to a borehole was limited to tens of meters. A drainage configuration whereby boreholes are connected to a somewhat distant tunnel by drainage pipes of differing lengths, often hundreds of meters, is shown with a numerical test to be a plausible explanation for the observed borehole behavior.

scholarly journals Dinamika Tinggi Muka Air Tanah Pada Lahan Gambut Yang Terbakar

2019 ◽  
Vol 15 (1) ◽  
pp. 86
Author(s):  
Nur Wakhid ◽  
Siti Nurzakiah ◽  
Zainudin Zainudin
Keyword(s):  
Water Level ◽  
Peat Soil ◽  
Fire Risk ◽  
Water Level Fluctuations ◽  
Strongly Correlated ◽  
Seasonal Fluctuations ◽  
Central Kalimantan ◽  
Level Measurement ◽  
Greenhouse Gases Emissions ◽  
Main Indicator

Seasonal fluctuations of water table depth are very important regarding the sustainable peat management on tropical peatland. Water level depth can affect the greenhouse gases emissions and as the main indicator for peat fire risk management. Therefore, direct measurement of water level dynamics in the peat burning area is absolutely necessary. The research objective was studied the water level fluctuations on burning peatland in Central Kalimantan, Indonesia. Water level measurement performed manually in the field and ditch, every week from February to December 2014. Water level from February to December 2014 were -86.6 and -51.9 cm, on the ditch and field, respectively. Peat soil water level was strongly correlated to the variations of rainfall.

scholarly journals SIFAT KIMIA DAN TINGGI MUKA AIR TANAH GAMBUT PADA TIGA TIPE PENGGUNAAN LAHAN DI FISIOGRAFI KUBAH GAMBUT DAN RAWA BELAKANG KHG KAHAYAN-SEBAGAU

2020 ◽  
Vol 8 (3) ◽  
pp. 315
Author(s):  
Marinus Kristiadi Harun ◽  
Syaiful Anwar ◽  
Eka Intan Kumala Putri ◽  
Hadi Susilo Arifin
Keyword(s):  
Land Cover ◽  
Water Level ◽  
Organic Material ◽  
Rainy Season ◽  
Chemical Elements ◽  
Peat Soil ◽  
Chemical Properties ◽  
Ground Surface ◽  
Water Level Fluctuations ◽  
Peat Soils

This study aims to: (1) determine the chemical properties of peat soils in 3 types of land cover in 2 physiographies; (2) find out water level fluctuations (WLF) on peat soils covered by agroforestry and horticulture in the physiography of peat dome and backswamp during the rainy season, transitions and drought. This research was conducted in January until December 2018 in Kahayan-Sebangau Peat Hidrological Unit, in the Kalampangan Vilagge. The results showed that differences in peat soil cover conditions at different physiographies affected chemical properties and WLF. The three types of peatland cover on both physiographic types of peatlands have a pH that categories into the very acid (<4.5). The results of this study indicate that nutrients (N, P, Kd, C, Mg, Al, Na and SO4) that are formed in each type of land cover in 2 physiographies indicate that these elements in peatlands are influenced by a layer of peat which obtains input of organic material from the plants above it. Peat fertility depends on the contribution of organic material from plants on it. Peatland cation exchange capacity values for all types are in the very high category (> 40). In addition to the chemical elements of the soil, the peat ground water level is highly volatile following rainfall so that during the peak of the dry season (MK) the WLF can reach 200 cm below the ground surface, and vice versa during the peak of the rainy season (MH) the WLF can inundate all peat soils.

AUTOMATIC WATER LEVEL MONITORING WITH IOT AND LPWAN

2019 ◽  
pp. 95-103
Author(s):  
Krum Videnov ◽  
Vanya Stoykova
Keyword(s):  
Water Level ◽  
Real Time ◽  
Early Warning ◽  
Water Sources ◽  
Water Levels ◽  
Water Level Fluctuations ◽  
Level Monitoring ◽  
Water Level Monitoring

Monitoring water levels of lakes, streams, rivers and other water basins is of essential importance and is a popular measurement for a number of different industries and organisations. Remote water level monitoring helps to provide an early warning feature by sending advance alerts when the water level is increased (reaches a certain threshold). The purpose of this report is to present an affordable solution for measuring water levels in water sources using IoT and LPWAN. The assembled system enables recording of water level fluctuations in real time and storing the collected data on a remote database through LoRaWAN for further processing and analysis.

Interaction between water pressure in the basal drainage system and discharge from an Alpine glacier before and during a rainfall-induced subglacial hydrological event

1997 ◽  
Vol 24 ◽  
pp. 288-292 ◽  
Author(s):  
Andrew P. Barrett ◽  
David N. Collins
Keyword(s):  
Water Level ◽  
Water Pressure ◽  
Drainage System ◽  
Water Levels ◽  
Drainage Network ◽  
Alpine Glacier ◽  
Hydraulic Conditions ◽  
Borehole Water ◽  
Progressive Growth ◽  
Resultant Increase

Combined measurements of meltwater discharge from the portal and of water level in a borehole drilled to the bed of Findelengletscher, Switzerland, were obtained during the later part of the 1993 ablation season. A severe storm, lasting from 22 through 24 September, produced at least 130 mm of precipitation over the glacier, largely as rain. The combined hydrological records indicate periods during which the basal drainage system became constricted and water storage in the glacier increased, as well as phases of channel growth. During the storm, water pressure generally increased as water backed up in the drainage network. Abrupt, temporary falls in borehole water level were accompanied by pulses in portal discharge. On 24 September, whilst borehole water level continued to rise, water started to escape under pressure with a resultant increase in discharge. As the drainage network expanded, a large amount of debris was flushed from a wide area of the bed. Progressive growth in channel capacity as discharge increased enabled stored water to drain and borehole water level to fall rapidly. Possible relationships between observed borehole water levels and water pressures in subglacial channels are influenced by hydraulic conditions at the base of the hole, distance between the hole and a channel, and the nature of the substrate.

Water level fluctuations of the lake of Paladru (Isère, France) in the Xth and XIth centuries AD

1985 ◽  
Vol 11 (1) ◽  
pp. 179-183
Author(s):  
Jean-Luc Borel ◽  
Jacques-Léopold Brochier ◽  
Karen Lundström-Baudais
Keyword(s):  
Water Level ◽  
Water Level Fluctuations

LYSIMETERS WITH RAINFALL AND SOIL WATER CONTROL

1971 ◽  
Vol 2 (2) ◽  
pp. 79-92 ◽  
Author(s):  
K. J. KRISTENSEN ◽  
H. C. ASLYNG
Keyword(s):  
Soil Moisture Content ◽  
Soil Depth ◽  
Irrigation System ◽  
Drainage System ◽  
Soil Surface ◽  
Trickle Irrigation ◽  
Water Control ◽  
Radiation Equipment ◽  
Different Depths ◽  
Growth Experiments

The lysimeter installation described comprises 36 concrete tanks each with a soil surface of 4 m2. The installation is useful for plant growth experiments under natural conditions involving different treatment combined with various controlled water supplies. The ground installation is at least 20 cm below the soil surface and tillage can be done with field implements. The lysimeter tanks are provided with a drainage system which can drain the soil at the bottom (100 cm depth) to a tension of up to 100 cm. A constant ground-water table at less than 100 cm soil depth can also be maintained. The soil moisture content at different depths is determined from an underground tunnel by use of gamma radiation equipment in metal tubes horizontally installed in the soil. Rainfall is prevented by a movable glass roof automatically operated and controlled by a special rain sensor. Water is applied to the soil surface with a special trickle irrigation system consisting of a set of plastic tubes for each lysimeter tank and controlled from the tunnel. Fertilizers in controlled amount can be applied with the irrigation water.

Sign in / Sign up

Export Citation Format

Share Document