Sea-Water Intrusion in the Coastal Area of Laizhou Bay, China: 1. Distribution of Sea-Water Intrusion and Its Hydrochemical Characteristics

Coastal Region of Kangkung, Kendal Regency, Central Java Province is one of the areas that experiencing water in the dry season. Groundwater exploitation is one way solution to meet the water needs for people in the area, especially in the dry season. Therefore it is necessary to study potency of ground water in coastal area of Kangkung. The research was conducted to determine the potential of ground water in the confined aquifer in the Coastal Region of Kangkung, Kendal District which is expected to be utilized as a source of water to meet the needs of local communities. The method used in this research is descriptive analysis to describe the condition of aquifer, however some things are delivered quantitatively. The aquifer condition was obtained from the interpretation of geoelectricity (resistivity) data supported by geological and hydrogeological observation data and pumping test data as secondary data. Groundwater quality analysis and simple hydrochemical analysis is with Chlorida - Bicarbonat Ratio (CBR) method to know the possibility of sea water intrusion. The results showed that the aquifer in the coastal area of Kangkung has the potential of 29.13 lt / sec ground water discharge which can be utilized to meet the needs of clean water 18,800 people. Although it is adjacent to the sea, the groundwater in the study area does not undergo sea water intrusion. Groundwater quality in this location is qualified as raw drinking water according to SK Menkes No, 492/Menkes/Per/IV2010 tentang Persyaratan Kualitas Air Minum. Keywords: ground water, geoelectric, intrusion Wilayah Pesisir Kangkung, Kabupaten Kendal Provinsi Jawa Tengah merupakan salah satu daerah yang pada musim kemarau mengalami kekeringan. Pemanfaatan air tanah merupakan salah satu cara untuk memenuhi kebutuhan air bagi masyarakat di daerah tersebut, terutama pada musim kemarau. Oleh karena itu perlu dilakukan kajian potensi air tanah di daerah Pesisir Kangkung tersebut. Penelitian ini bertujuan untuk mengetahui potensi air tanah pada akuifer dalam (tertekan) di Wilayah Pesisir Kangkung, Kabupaten Kendal yang diharapkan dapat dimanfaatkan sebagai sumber air bersih untuk memenuhi kebutuhan masyarakat setempat. Metode penelitian yang digunakan dalam penelitian ini adalah diskriptis analisis untuk menggambarkan kondisi akuifer, namun demikian beberapa hal disampaikan secara kuantitatif. Kondisi akuifer diperoleh dari hasil interpretasi data geolistrik resistiviti dengan didukung data hasil pengamatan geologi dan hidrogeologi serta data sekunder berupa hasil pumping test. Analisa kualitas air tanah dan analisis hidrokimia secara sederhana dengan metode Chlorida – Bicarbonat Ratio (CBR) dilakukan untuk mengetahui kemungkinan terjadinya intrui air laut. Hasil penelitian menujukan bahwa akuifer di daerah Pesisir Kangkung mempunyai potensi debit air tanah 29,13 lt/det yang dapat dimanfaatkan untuk memenuhi kebutuhan air bersih 18.800 orang. Meskipun berbatasan dengan laut, namun air tanah di daerah kajian tidak mengalami terintrusi air laut. Kualitas air tanah di lokasi ini memenuhi syarat sebagai bahan baku air minum sesuai SK Menkes No, 492/Menkes/Per/IV2010 tentang Persyaratan Kualitas Air Minum. Kata Kunci : air tanah, geolistrik, intrusi

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Mapping sea water intrusion in coastal area using time-domain electromagnetic method with different loop dimensions

Journal of Applied Geophysics ◽

10.1016/j.jappgeo.2020.103963 ◽

2020 ◽

Vol 175 ◽

pp. 103963 ◽

Cited By ~ 2

Author(s):

Hesham El-Kaliouby

Keyword(s):

Time Domain ◽

Coastal Area ◽

Sea Water ◽

Electromagnetic Method ◽

Sea Water Intrusion ◽

Water Intrusion ◽

Time Domain Electromagnetic

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Intrusi Air Laut di Pesisir Tugu Kota Semarang Berdasarkan Resistiviti dan Hidrokimia

Jurnal Kelautan Tropis ◽

10.14710/jkt.v21i2.3610 ◽

2018 ◽

Vol 21 (2) ◽

pp. 75

Author(s):

Sugeng Widada ◽

Baskoro Rochaddi ◽

Chrisna Adhi Suryono ◽

Irwani Irwani

Keyword(s):

Coastal Area ◽

Land Surface ◽

Sea Water ◽

Descriptive Analysis ◽

Unconfined Aquifer ◽

Sea Water Intrusion ◽

Diagram Method ◽

Groundwater Exploitation ◽

Water Intrusion ◽

The North

Sea Water Intrusion in Tugu Coastal Area of Semarang City Based on Resistivity and Hydrochemical Tugu Coastal Area is one of the coastal areas in Semarang City, Central Java Province that continues to grow. Although the clean water network from the Local Water Supply Utility is available, groundwater is still used to meet the water needs of the community. Some of the groundwater in the area is brackish to salty conditions as the result of sea water intrusion process. The research aims to determine configuration of aquifers which have been intruded with sea water in Tugu Coastal Area, Semarang City, so that groundwater exploitation from the aquifer can be avoided. The method used in this study was descriptive analysis, in which the condition of aquifers was based on interpretation of resistivity data. Simple hydrochemical facies analysis using the Trilinier Piper Diagram method is carried out to detect sea water intrusion. The results of the study indicated that aquifers in the Coastal area consisted of several layers. Aquifer which has been intruded with seawater is located on the north side of the Semarang - Kendal highway, both for confined and unconfined aquifers. The depth of confined aquifer which is intruded by sea water reaches 50 - 75 m below the local land surface. While the unconfined aquifer depth is up to a depth of 6 m below the local land surface. Wilayah Pesisir Tugu, Kota Semarang, Provinsi Jawa Tengah merupakan salah satu daerah pesisir di Kota Semarang yang terus berkembang. Meskipun jaringan air bersih dari Perusahaan Daerah Air Minum telah tersedia, namun pemanfaatan air tanah masih digunakan untuk memenuhi kebutuhan air bagi masyarakat. Sebagian air tanah di daerah tersebut dalam kondisi payau hingga asin yang diduga akibat proses intrusi air laut.. Penelitian ini bertujuan untuk mengetahui konfigurasi akuifer yang telah terintrusi air laut Wilayah Pesisir Tugu, Kota Semarang, sehingga dapat dihindari pengambilan air tanah dari akuifer tersebut. Metode penelitian yang digunakan dalam penelitian ini adalah diskriptis analisis untuk menggambarkan kondisi akuifer berdasarkan hasil interpretasi data geolistrik resistiviti. Analisa fasies hidrokimia secara sederhana dengan metode Diagram Triliner Piper dilakukan untuk mendeteksi adanya intrusi air laut. Hasil penelitian menujukan bahwa akuifer di daerah Pesisir Tugu terdiri dari beberapa lapisan. Akuifer yang telah terintrusi air laut adalah yang berada di sebelah utara jalan raya Semarang – Kendal, baik untuk akuier bebas maupun akuifer tertekan. Kedalaman akuifer tertekan yang terintrusi adalah hingga mencapai 50 sampai dengan 75 m di bawah muka tanah setempat. Sedangkan kedalaman akuifer bebasnya berada hingga kedalaman 6 m di bawah muka tanah setempat

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Pengukuran Kandungan Air Tanah di Sekitar Pesisir Kabupaten Situbondo

Al-Ard Jurnal Teknik Lingkungan ◽

10.29080/alard.v6i1.1037 ◽

2020 ◽

Vol 6 (1) ◽

pp. 20-28

Author(s):

Wiyono Wiyono

Keyword(s):

Coastal Area ◽

Sea Water ◽

Geographical Location ◽

Well Water ◽

Sea Water Intrusion ◽

Water Intrusion ◽

The Road ◽

Air Content ◽

A Value ◽

Value Range

Geographical location owned by Situbondo Regency has a coastal area, which could have the potential for sea water intrusion. Therefore, this study aims to explore water resources, namely groundwater in a coastal area of Situbondo Regency - Banyuwangi Regency, which can be used to see the feasibility of life, especially for humans and animals. This research was conducted by sampling groundwater or well water using 3 parameters, namely TDS, pH, and salinity. After measuring the air content using TDS and pH parameters, ground or well water content, it is still suitable for use with a value range of 746 to 1170 mg/L for TDS, and 6.27 to 7.91 for pH content. Meanwhile, the salinity parameter can deny that the area measured in the study experienced sea water intrusion, but the value is not too high, namely 2 to 4 ‰. Then, for future improvements, it is necessary to carry out further research along the road from Situbondo District - Banyuwangi Regency to obtain a broader picture.

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Groundwater Vulnerability from Sea Water Intrusion in Coastal Area Cilacap, Indonesia

Indonesian Journal of Geography ◽

10.22146/ijg.18229 ◽

2019 ◽

Vol 51 (2) ◽

pp. 206

Author(s):

Setyawan Purnama

Keyword(s):

Water Resources ◽

Linkage Analysis ◽

Coastal Area ◽

Sea Water ◽

Groundwater Vulnerability ◽

Research Area ◽

Sea Water Intrusion ◽

Low Level ◽

Water Intrusion ◽

Relationship Of

The important issue relating to water resources is sea water intrusion (SWI) phenomena. Nowadays, the phenomena has become serious problem in the urban coastal area. Groundwater as main sources for domestic usage cannot be used again because of its salinity.Cilacap as one of urban coastal area also face the problem. In 1977 SWIwas detectedand experienced significant developmentsin 1996,This research was conducted to: (1) analyze agroundwater vulnerability to the SWI; (2) determine adistance and adepth theinterface; and (3) analyze relationship of the groundwater vulnerability to the interface depth.It was performed an analysis of the groundwater vulnerability to the SWI using the method of GALDIT, whereas the distance and depth of the interface was determined using the method of DupuitGhyben-Herzberg. The linkage analysis of the groundwater vulnerability to the depth of the actual interface was conducted by quantitative descriptively.The results showed that the distance from the shoreline was the most determined factor of the groundwater vulnerability to the SWI, the closer to the shoreline the more swallow the depth of the interface. It existed the relevance between the vulnerability level of groundwater to the SWI with the depth of actual interface. The regions with low level of vulnerability had deep interface depth, whereas the regions with moderate level of vulnerability had swallow interface depth. Nevertheless, the SWI has not yet affected the groundwater in people wells because of its depth that was not yet exceeded of 25 m.so that this depth can be used as a reference in digging wells in the research area++

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Effects of Human Activities in the Coastal Zone of Laizhou Bay

Ecological Chemistry and Engineering S ◽

10.2478/eces-2021-0016 ◽

2021 ◽

Vol 28 (2) ◽

pp. 219-227

Author(s):

Min Wang ◽

Mei Han ◽

Hongkuan Hui ◽

Yunlong Li

Keyword(s):

Coastal Zone ◽

Fish Species ◽

Human Activities ◽

Sea Water ◽

Field Measurements ◽

Laizhou Bay ◽

Sea Water Intrusion ◽

Fish School ◽

Water Intrusion ◽

Dominant Fish

Abstract The serious destruction of resources and environment in Laizhou Bay has attracted extensive attention of researchers. This study mainly analysed the changes of fish structure and environment in the coastal zone of Laizhou Bay caused by human activities. By consulting literatures and field measurements, the changes of dominant fish species, coastline and sea water intrusion were analysed. The results showed that dominant fish species in Laizhou Bay change from high-economic species to low-economic species under the influence of human activities, and the coastline erosion was serious, and the area of sea water intrusion was also increasing year by year. It is concluded from the research results that human activities had a significant impact on the structure of fish school and the environment. It is necessary to arrange human activities in an appropriate amount to reduce the overexploitation of resources in order to restore the fishery resources and environment in Laizhou Bay.

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AQUIFER CHARACTERIZATION AND EVALUATION OF SEA WATER INTRUSION USING HYDROGEOCHEMICAL ANALYSES FOR MALEKULA, VANUATU

10.1130/abs/2020am-354185 ◽

2020 ◽

Author(s):

Ashley Korin ◽

◽

Shafiul Chowdhury ◽

Donald Hodder

Keyword(s):

Sea Water ◽

Aquifer Characterization ◽

Sea Water Intrusion ◽

Water Intrusion

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Groundwater Monitoring Systems to Understand Sea Water Intrusion Dynamics in the Mediterranean: The Neretva Valley and the Southern Venice Coastal Aquifers Case Studies

Water ◽

10.3390/w13040561 ◽

2021 ◽

Vol 13 (4) ◽

pp. 561

Author(s):

Ivan Lovrinović ◽

Alessandro Bergamasco ◽

Veljko Srzić ◽

Chiara Cavallina ◽

Danko Holjević ◽

...

Keyword(s):

Real Time ◽

Coastal Aquifers ◽

Sea Water ◽

Quantitative Information ◽

Water Dynamics ◽

Monitoring Systems ◽

Driving Mechanism ◽

Sea Water Intrusion ◽

Water Intrusion ◽

Aquifer Systems

Sea water intrusion (SWI) has been widely recognized as a global problem, significantly influencing coastal aquifers, mostly through reduced water quality and agricultural production indicators. In this paper, we present the outcomes of the implementation of two independent real-time monitoring systems, planned and installed to get insights on groundwater dynamics within the adjacent coastal aquifer systems, one located in the Neretva Valley, southeastern Croatia, the other located south of the Venice lagoon, northeastern Italy. Both systems are presented with technical details and the capacity to observe, store, and transmit (Neretva site) observed values in real-time. Analysis of time series reveals the significant influence of the sea level oscillations onto the observed groundwater electrical conductivity (EC) and piezometric head values, while precipitation rate is detected as a driving mechanism for groundwater parameters in shallow geological units. The installed monitoring systems are shown to be of great importance to provide qualitative and quantitative information on the processes influencing groundwater and surface water dynamics within two coastal systems.

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