scholarly journals Nitrate in groundwater of the west side Magelang Regency, Central Java, Indonesia

2021 ◽  
Vol 926 (1) ◽  
pp. 012081
Author(s):  
D Erlinawati ◽  
D P E Putra ◽  
A D Titisari
Keyword(s):  
Agricultural Sector ◽  
Nitrate Content ◽  
Wet Season ◽  
The West ◽  
Chromatography Method ◽  
West Side ◽  
Central Java ◽  
Groundwater Sampling ◽  
Groundwater Samples ◽  
Dug Wells

Abstract Nitrate (NO3-) pollution in groundwater is generally caused by chemical fertilizers from the agricultural sector and wastewater from onsite sanitation. Magelang Regency, Central Java, Indonesia, is a large food estate that has 206 km2 paddy fields. In addition, this area is inhabited by 1.3 million people who produce onsite sanitary waste every day. Due to the concentration and intensity of fertilization and sanitary waste, which are quite high, Magelang Regency is susceptible to groundwater pollution by nitrate. This study aims to determine the characteristics of nitrate in the groundwater of the west side Magelang Regency, Central Java, Indonesia. The research was carried out by testing groundwater samples taken from several springs, dug wells, and drilled wells used by society for their daily needs. Groundwater sampling was carried out in the wet season and tested using the ion chromatography method to determine the level of nitrate in groundwater and know the chemical characteristics to analyze dominant ions in groundwater. The results showed that the average nitrate was 3.9 mg/l; the deviation standard was 5.12; minimum nitrate was 0 mg/l; and maximum nitrat was 20.78 mg/l. The origin of nitrate content may come come from feces but still in small quantities. Facies of groundwater are Ca-HCO3 and Na-Cl. It can be concluded that the groundwater of the west side Magelang Regency is not yet polluted by nitrate. However, there is still a possibility in the future, so that necessary to apply for groundwater protection immediately.

Evaluation of Groundwater Quality for Domestic and Irrigation Suitability from Upper Bhima Basin, Western India: A Hydro-geochemical Perspective

2019 ◽  
Vol 2 (2) ◽  
pp. 113-123 ◽  
Author(s):  
Himanshu Gaikwad ◽  
Huzefa Shaikh ◽  
Bhavana Umrikar
Keyword(s):  
Anthropogenic Activities ◽  
Groundwater Resources ◽  
Total Hardness ◽  
Nitrate Content ◽  
Western India ◽  
High Concentration ◽  
Major Cations ◽  
Groundwater Samples ◽  
Dug Wells ◽  
Basaltic Aquifer

Major ion constituents present in groundwater are studied for shallow unconfined basaltic aquifer in order to understand the quality of groundwater resources and its impacts on inhabitants and irrigation. 30 groundwater samples collected from dug wells located in upper Bhima basin were analyzed to measure major cations and anions for establishing water quality index (WQI) and irrigation indices. The concentration of pH, electrical conductivity, total hardness, total dissolved solids and major cations and anions were analyzed. Groundwater types were detected using Piper’s trilinear diagram as Ca2+-HCO3−, Ca2+-Na+-HCO3−, mixed Ca2+-Mg2+-Cl− and Ca2+-Cl− groups. High concentration (8 to 194 mg/L) of nitrate was found at some locations in the region. WQI shows 66% of the samples to be unfit for drinking purposes due to high nitrate content mostly introduced because of the anthropogenic activities. Suitability of groundwater for irrigation purposes was determined using of Sodium Adsorption Ratio (SAR), Permeability Index (PI), Kelly Ratio (KR), Magnesium Hazard (MH), Sodium (%) and Residual Sodium Carbonate (RSC). Groundwater in the region is suitable for irrigation.

scholarly journals KOMODITAS UNGGULAN TANAMAN PANGAN DI PULAU JAWA

Agro Ekonomi ◽  
2010 ◽  
Vol 17 (1) ◽  
Author(s):  
Agus Dwi Nugroho
Keyword(s):  
Agricultural Sector ◽  
Descriptive Analysis ◽  
Decision Makers ◽  
Green Beans ◽  
Location Quotient ◽  
The West ◽  
Central Java ◽  
Key Sectors ◽  
Dynamic Location ◽  
Food Commodities

Existence of a region will depend heavily on the accuracy of decision-makers in determining the direction of regional development, especially relating to the development sector basis. Agricultural sector, particularly food crops is one of the key sectors in the island of Java. The purpose of this study was to determine pre-eminent food commodities each province on the Java. The method used in this research is descriptive analysis. Type of data used in Indonesiathan in 2006-2008. The analysis used in this study is the Location Quotient (LQ) and Dynamic Location Quotient (DLQ). Pre eminent crops in Bnaten province that have two of rice and peanuts. Pre eminent crops in the West Java rice and weet potatoes. DKI has one pre-eminent  crops that is rice. Central java has four pre eminent crops corn, green beans, peanuts and soybeans. Pre eminent crops in the DIY is peanuts and cassava. East java provincehas four pre eminent, crops corn, green neams, peanuts and soybeans. 

scholarly journals POLA SPASIAL DAN TEMPORAL KEGIATAN PENANGKAPAN RAJUNGAN NELAYAN BETAHWALANG KABUPATEN DEMAK

2019 ◽  
Vol 25 (2) ◽  
pp. 67
Author(s):  
Lana Izzul Azkia ◽  
Muhammad Fedi Alfiadi Sondita ◽  
Eko Sri Wiyono
Keyword(s):  
Operational Cost ◽  
Fishing Community ◽  
Wet Season ◽  
The West ◽  
Grid Map ◽  
Central Java ◽  
Gill Net ◽  
Monsoon Wind ◽  
West Monsoon ◽  
Fishing Area

Desa Betahwalang merupakan sebuah sentra pendaratan rajungan yang terletak di pesisir Kabupaten Demak Jawa Tengah. Kegiatan penangkapan rajungan adalah mata pencaharian utama nelayan Betahwalang. Lokasi dan waktu pengoperasian alat penangkapan ikan menentukan besar biaya operasional dan kualitas rajungan. Ketersediaan data dan informasi secara spasial dan temporal adalah faktor keberhasilan dalam kegiatan penangkapan dan sejauh ini belum tersedia secara rinci. Penelitian ini bertujuan mengkaji lokasi dan waktu penangkapan rajungan oleh nelayan Betahwalang dalam dua musim, yaitu musim angin barat (musim hujan) dan musim angin timur (musim kemarau). Data diperoleh dari wawancara terhadap 30 responden per jenis alat tangkap (bubu, arad, dan jaring insang dasar). Informasi tentang lokasi dan waktu penangkapan rajungan diplot langsung pada sebuah peta grid berukuran 1 km x 1 km. Selanjutnya, informasi dari peta tersebut dipindahkan ke peta grid berukuran 10 km x 10 km. Lokasi penangkapan dominan nelayan bubu di perairan sekitar bagian barat Betahwalang (zona E5) pada musim angin barat dan di perairan sekitar bagian utara Semarang (zona F6) pada musim angin timur, sementara lokasi penangkapan dominan nelayan arad adalah perairan sekitar bagian utara Semarang (zona F6) baik pada musim angin barat maupun timur; untuk lokasi penangkapan dominan nelayan jaring insang dasar pada musim angin barat adalah perairan sekitar bagian barat Betahwalang (zona G5) dan perairan sekitar bagian utara Semarang (zona F6) pada musim angin timur.Betahwalang is center of blue swimming crab (BSC) landing place in coastal area of Demak, Central java. BSC fishing is the main livelihood of betahwalang fishing community. The fishing area and fishing time determine the operational cost and BSC quality. The availability of data and information on spatial and temporal is successful factors in BSC fishing bussiness and these were not available yet. This study aimed to assess BSC fishing area and fishing time of Betahwalang fisher in two seasons, i.e westerly monsoon wind (wet season) and easterly monsoon wind (dry season). Data were collected through interview to 30 respondent for each type of fishing fleet (traps, mini trawl and bottom gill net). Information on fishing area and fishing time was plotted on the grid map 1 km x 1 km, then transferred to a grid map 10 km x 10 km. The result showed that the major fishing area of collapsible trap on the west monsoon around western of Betahwalang waters (zone E5), while during east monsoon they operated around northern of Semarang (zone F6). The major fishing area of mini trawl during west and east monsoon was on the waters around northern of Semarang (zone F6). The major fishing area of bottom gillnet on the west monsoon was around western of Betahwalang (zone G5), while east monsoon around northern of Semarang (zone F6).

A Stationary Packer System for Layerwise Groundwater Sampling in Monitoring Wells – Technique and Results

1991 ◽  
Vol 23 (1-3) ◽  
pp. 545-553
Author(s):  
M. Rödelsperger ◽  
U. Rohmann ◽  
F. Frimmel
Keyword(s):  
Groundwater Discharge ◽  
Groundwater Table ◽  
Experimental Results ◽  
Concentration Profiles ◽  
Sampling Device ◽  
Local Conditions ◽  
Monitoring Wells ◽  
Deep Aquifers ◽  
Groundwater Sampling ◽  
Groundwater Samples

A sampling device was designed as a stationary equipment for deep monitoring wells in order to obtain representative groundwater samples from different layers of the aquifer. The device consists of several packer units which can be combined at variable distances, allowing adaption to the local conditions of the aquifer and of the well. The pumps are situated below the groundwater table. Each of the drawing tubes ends between two packers at the concerning depth. Experimental results demonstrate the importance of the application of a stationary packer system instead of a mobile doublepacker in deep aquifers of inhomogeneous structure. Examples of concentration profiles obtained from layerwise groundwater sampling are given and a technique for selective groundwater discharge is described.

scholarly journals La datation du choeur de l’église de Vaucelles reproduit en plan par Villard de Honnecourt

2018 ◽  
Vol 81 (3) ◽  
pp. 411-417
Author(s):  
Laurence Terrier Aliferis
Keyword(s):  
Nineteenth Century ◽  
Historical Sources ◽  
The West ◽  
West Side ◽  
Villard De Honnecourt ◽  
The Church

Abstract The ruined Cistercian church of Vaucelles is known only by a few preserved fragments and a plan of the choir reproduced by Villard of Honnecourt. Historical sources provide three key dates: 1190 (start of construction), 1215 (entry into the new church), 1235 (date of the dedication). From the nineteenth century until now, it was considered that the foundations were laid in 1190 and that the construction started on the west side of the church. In 1216, the nave would have been completed, and the choir would have been built between 1216 and 1235. Consultation of the historical sources and examination of the historiographic record changes this established chronology of the site. In fact, the construction proceeded from east to west. The choir reproduced in 1216 or shortly before by Villard de Honnecourt presents the building as it then appeared, with the eastern part of the building totally completed.

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