Sea Water Intrusion Monitoring on the Sendangbiru of the Southern Malang Coastal Area based on Geoelectrical Resistivity Data

2021 ◽  
Vol 14 (9) ◽  
pp. 43-48
Author(s):  
Sunaryo .
Keyword(s):  
Data Acquisition ◽  
Cross Section ◽  
Seawater Intrusion ◽  
Cross Sections ◽  
Sea Water ◽  
Salt Water ◽  
Sea Water Intrusion ◽  
Electrical Sounding ◽  
Geoelectrical Resistivity ◽  
Intrusion Layer

The study was conducted with the objective to distinguish the presence of seawater intrusion layer or salt-water aquifer distribution along the data acquisition line at the locations. Data acquisition was conducted by using the Wenner-Schumberger configuration of geoelectrical resistivity. From this research, 4 lines and 4 points of vertical electrical sounding (VES) data for every line were obtained with the distance between electrode a as 10m. Based on the data processing, obtained depth up to 120m with the smallest resistivity value is 0.02Ωm and the largest is 6764.52Ωm. To make the distribution of resistivity values along the path line of the study, cross sections were made until a depth of 120m. Based on the cross-section, the low resistivity value (less than 1.5 Ωm) that interpreted as a seawater intrusion layer or salt water aquifer distribution is located at varying depths. There are intrusions for the SB1 cross section, there is an intrusion at a depth of 6m-7m as far as 10m, at a depth of 6m-8m as far as 10m for the SB2 cross section and at a depth of 22m - 26m as far as 25m for the SB3 cross section.

Control of sea-water intrusion by salt-water pumping: Coast of Oman

2009 ◽  
Vol 17 (3) ◽  
pp. 541-558 ◽  
Author(s):  
A. R. Kacimov ◽  
M. M. Sherif ◽  
J. S. Perret ◽  
A. Al-Mushikhi
Keyword(s):  
Sea Water ◽  
Salt Water ◽  
Sea Water Intrusion ◽  
Water Intrusion ◽  
Water Pumping

Sea Water Intrusion into the Fraser River and its Relation to the Incidence of Shipworms in Steveston Cannery Basin

1958 ◽  
Vol 15 (1) ◽  
pp. 91-113 ◽  
Author(s):  
Susumu Tabata ◽  
Robin J. LeBrasseur
Keyword(s):  
River Discharge ◽  
Sea Water ◽  
Salt Water ◽  
Larval Settlement ◽  
River Estuary ◽  
River Channel ◽  
Fraser River ◽  
Sea Water Intrusion ◽  
Factors Affecting ◽  
Water Intrusion

The presence of shipworms (Bankia setacea) in Steveston Cannery Basin in the Fraser River estuary is attributed to sea water intrusion. River discharge, tides, geometry of the river channel and basin, and density of the intruding sea water are factors affecting intrusion, which in turn influence larval settlement. Settlement may occur at depths where salinity is less than 15‰ but the larvae fail to survive. However, they will continue to develop where salinity exceeds 20‰. Dredging the channel to a continuous grade would eliminate permanent salt-water "pools" along the bottom and prevent infestation.

scholarly journals PKM KONSERVASI AIR TANAH DI KECAMATAN MAPPAKASUNGGU DAN MANGGARABOMBANG KABUPATEN TAKALAR

2020 ◽  
Vol 4 (2) ◽  
pp. 172
Author(s):  
Muhammad Hamzah Syahruddin ◽  
Amiruddin Amiruddin ◽  
Halmar Halide ◽  
Sakka Sakka ◽  
Makhrani Makhrani
Keyword(s):  
Ground Water ◽  
Rainy Season ◽  
Sea Water ◽  
Salt Water ◽  
Water Crisis ◽  
Groundwater Extraction ◽  
Sea Water Intrusion ◽  
Groundwater Exploitation ◽  
The Government ◽  
And Training

Groundwater Conservation in Mappakasunggu and Manggarabombang, District TakalarAbstract. Groundwater is water that is contained in layers of soil or rocks below the surface. Many damages are caused by excessive groundwater extraction. For example, one of the residents' wells in Tamaona Lengkese that had been closed because the water had turned to salt water after being used for 10 years. This phenomenon shows that there is sea water intrusion because the rate of groundwater exploitation is greater than the rate of recharge. Besides that, every year there is a drought in the dry season and flooding in the rainy season. Therefore, to avoid a prolonged water crisis, there must be efforts from the government and all levels of society to conserve groundwater. To overcome the various problems of the partners, the Unhas PPMU-PKM team conducted groundwater conservation counseling and training. Counseling is done to the community to understand the existence of ground water and how its conservation. While training was given to improve the skills of the community to conserve groundwater. The results of this education and training are that more than 80% participants have understood how the presence of ground water and its conservation and are able to conserve groundwater with infiltration holes and injection wells.Keywords: Biopore, permeability, ground water, conservation.Abstrak. Air tanah adalah air yang terdapat dalam lapisan tanah atau bebatuan di bawah permukaan tanah. Banyak dampak kerusakan yang ditimbulkan akibat pengambilan air tanah yang berlebihan. Sebagai contoh, salah satu sumur  warga di Tamaona Lengkese yang telah ditutup karena airnya sudah berubah menjadi air asin setelah digunakan 10 tahun. Fenomena ini menunjukkan adanya intrusi air laut karena laju pengambilan air tanah jauh lebih besar dibandingkan dengan laju pengimbuhan. Selain itu setiap tahun di daerah tersebut terjadi kekeringan pada musim kemarau dan banjir pada musim hujan. Oleh karena itu, harus ada upaya pemerintah dan lapisan masyarakat untuk melakukan konservasi air tanah untuk menghindari krisis air berkepanjangan. Untuk mengatasi berbagai persoalan mitra tersebut tim PPMU-PKM Unhas melakukan penyuluhan dan pelatihan konservasi air tanah. Penyuluhan dilakukan kepada masyarakat untuk memahami keberadaan air tanah dan bagaimana konservasinya. Sedangkan pelatihan diberikan untuk meningkatkan keterampilan masyarakat untuk melakukan konservasi air tanah. Hasil dari penyuluhan dan pelatihan ini adalah peserta telah memahami bagaimana keberadaan air tanah dan konservasinya diatas 80% dan mampu melakukan konservasi air tanah dengan lubang resapan dan sumur injeksi.Kata kunci:  Biopori, permeabilitas, air tanah, konservasi.

scholarly journals Prediksi Intrusi Air Laut Berdasarkan Nilai Daya Hantar Listrik dan Total Dissolved Solid di Kabupaten Tangerang

2019 ◽  
Vol 8 (4) ◽  
pp. 243
Author(s):  
Roh Santoso Budi Waspodo ◽  
Silvia Kusumarini ◽  
Vita Ayu Kusuma Dewi
Keyword(s):  
Sea Water ◽  
Salt Water ◽  
Primary Data ◽  
Negative Slope ◽  
Salt Water Intrusion ◽  
Sea Water Intrusion ◽  
Water Intrusion ◽  
Observation Area ◽  
Measurement Results ◽  
Total Dissolved Solid

Intrusion of sea water is the infiltration of sea water into the soil. This might be caused by a groundwater excessive exploration. Tangerang District is one of the areas that have great potential sea water intrusion. The aim of research was to predict the limit of salt water intrusion based on the value of DHL and TDS. The primary data were measured using a TOA EC meter CM-14P and then were processed using Surfer 9.0 software and ArcGIS. The measurement results was compared with PAHIAA Decision (1986) and Carroll’s Classification (1962). The results showed that the intrusion area could be identified by DHL and TDS values. On the area located far from the beach, intrusion was influenced by the presence of a river in the region. This was indicated by the regression analysis that showed a correlation between distance and value DHL/TDS with a negative slope value. Based on DHL and TDS parameters in observation area, the groundwater conditions in  Tangerang District within a radius of 0.095 km to 5 km from the littoral areas are categorized as medium intrusion zone (slightly brackish water) with DHL 1500-1999 μmhos/cm and TDS values 1000-3000 mg/LU.

scholarly journals Aplikasi Metode Resistivitas 2D untuk Menentukan Intrusi Air Laut di Lambada Lhok Aceh Besar Aceh

2019 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Gartika Setiya Nugraha ◽  
Marwan Marwan ◽  
Akmal Muhni
Keyword(s):  
Seawater Intrusion ◽  
Sea Water ◽  
Average Height ◽  
Water Crisis ◽  
Sea Water Intrusion ◽  
Water Intrusion ◽  
Section Model ◽  
Freshwater Aquifers ◽  
2D Resistivity ◽  
The Village

Lambada Lhok is one of the coastal areas with the most severe water crisis in Aceh Besar, Aceh. Clean water crisis happening in the area because of their breach of saltwater into freshwater aquifers and also due to the large decrease in ground water level that resulted in seawater intrusion. This research was conducted on four lines at two locations, namely: 3 (three) lines in the village of Lambada Lhok and 1 (one) line in the village of Kajhu. Kajhu village was used as comparative data for areas that are free from the intrusion of sea water. The research method using 2D resistivity Wenner-Schlumberger configuration, while the data acquisition using the ARES equipment. Data analysis using Res2Dinv software to make 2-dimension (2-D) cross section model. Lambada Lhok village is an alluvial deposition with an average height of 0-5 meters above sea level (dpl). The subsurface lithology of the village lambada lhok consists of clay sand, sandy clay and clay. Based on the results of the analysis of resistivity values indicate that the suspected sea water intrusion in the village of Lambada Lhok reaches a depth of 29 meters. It can be concluded that the spread of sea water intrusion in Lambada Lhok beginning of the line LL 1, LL 2 to LL 3. Distribution of seawater intrusion are most severe in the trajectory LL 2 and began to decrease at LL 3 trajectory.

Sea water intrusion and salt water intrusion in the coastal area of Laizhou Bay

1998 ◽  
Vol 43 (12) ◽  
pp. 983-992 ◽  
Author(s):  
Xue Yuqun ◽  
Wu Jichun ◽  
Xie Chunhong ◽  
Zhang Yongxiang
Keyword(s):  
Coastal Area ◽  
Sea Water ◽  
Salt Water ◽  
Salt Water Intrusion ◽  
Laizhou Bay ◽  
Sea Water Intrusion ◽  
Water Intrusion

scholarly journals Assessment of Sea Water Intrusion in Muthupettai Block

2016 ◽  
Vol 3 (3) ◽  
Author(s):  
B. Pavithra ◽  
M. Renganathan
Keyword(s):  
Tamil Nadu ◽  
Artificial Recharge ◽  
Sea Water ◽  
Salt Water ◽  
Coastal Region ◽  
Geographical Information ◽  
Salt Water Intrusion ◽  
Mixing Index ◽  
Sea Water Intrusion ◽  
Water Intrusion

<div><p><em>Salt water intrusion into coastal aquifers is potentially a major problem in the coastal region of Muthupettai block in Thiruthuraipoondi taluk (Thiruvarur District, Tamil Nadu), hence in order to assess the vulnerability area, ground water study should be done. By the water quality variations sea water mixing index is assessed. Seawater mixing index is used to describe the vulnerability area and the extension of intrusion over the study area. Thematic maps of factors influencing the sea water intrusion were prepared and overlaid using Geographical Information System (GIS). By the vulnerability mapping, the suitable area for the remediation technique of sea water intrusion that should be practiced in the study area will be decided. Rain water harvesting and artificial recharge techniques are more useful as a tool in remediation of salt water intrusion. Estimation of surplus run-off is also very important in planning artificial recharge schemes.</em></p></div>

Electron Irradiation Effects in Polyoxymethylene Crystals Grown Inside Trioxane Crystals

1971 ◽  
Vol 29 ◽  
pp. 78-79
Author(s):  
J. P. Colson ◽  
D. H. Reneker
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Detailed Examination ◽  
The Other ◽  
Electron Micrograph ◽  
Irradiation Effects ◽  
Threefold Axis ◽  
Typical Sample ◽  
Polymer Crystals ◽  
Chain Axis

Polyoxymethylene (POM) crystals grow inside trioxane crystals which have been irradiated and heated to a temperature slightly below their melting point. Figure 1 shows a low magnification electron micrograph of a group of such POM crystals. Detailed examination at higher magnification showed that three distinct types of POM crystals grew in a typical sample. The three types of POM crystals were distinguished by the direction that the polymer chain axis in each crystal made with respect to the threefold axis of the trioxane crystal. These polyoxymethylene crystals were described previously.At low magnifications the three types of polymer crystals appeared as slender rods. One type had a hexagonal cross section and the other two types had rectangular cross sections, that is, they were ribbonlike.

A quantitative approach to inner shell losses

1978 ◽  
Vol 36 (1) ◽  
pp. 526-527 ◽  
Author(s):  
R.D. Leapman ◽  
P. Rez ◽  
D.F. Mayers
Keyword(s):  
Energy Transfer ◽  
Cross Section ◽  
Cross Sections ◽  
Accurate Determination ◽  
Background Intensity ◽  
Core Excitation ◽  
Quantitative Basis ◽  
Cross Section Differential ◽  
Bound Electrons

Microanalysis by EELS has been developing rapidly and though the general form of the spectrum is now understood there is a need to put the technique on a more quantitative basis (1,2). Certain aspects important for microanalysis include: (i) accurate determination of the partial cross sections, σx(α,ΔE) for core excitation when scattering lies inside collection angle a and energy range ΔE above the edge, (ii) behavior of the background intensity due to excitation of less strongly bound electrons, necessary for extrapolation beneath the signal of interest, (iii) departures from the simple hydrogenic K-edge seen in L and M losses, effecting σx and complicating microanalysis. Such problems might be approached empirically but here we describe how computation can elucidate the spectrum shape.The inelastic cross section differential with respect to energy transfer E and momentum transfer q for electrons of energy E0 and velocity v can be written as

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