scholarly journals Groundwater potentiality assessment in an arid zone using a statistical approach and multi-criteria evaluation, southwestern Tunisia

2019 ◽  
Vol 63 (1) ◽  
Author(s):  
Mohamed Haythem MSADDEK ◽  
Dhekra SOUISSI ◽  
Yahya MOUMNI ◽  
Ismail CHENINI ◽  
Nacira BOUAZIZ ◽  
...  
Keyword(s):  
Statistical Approach ◽  
Arid Zone ◽  
Multi Criteria Evaluation ◽  
Groundwater Potentiality ◽  
Southwestern Tunisia

Delivering Sustainable Water Systems Using Kalman Filter and Statistical Approach

2017 ◽  
Vol 4 (1) ◽  
pp. 41-52
Author(s):  
Dedy Loebis
Keyword(s):  
Kalman Filtering ◽  
Statistical Approach ◽  
Water Systems ◽  
Data Sets ◽  
Pressure Data ◽  
Burst Event ◽  
Sample Data ◽  
Other Information ◽  
Supply Systems ◽  
Frequency Features

This paper presents the results of work undertaken to develop and test contrasting data analysis approaches for the detection of bursts/leaks and other anomalies within wate r supply systems at district meter area (DMA)level. This was conducted for Yorkshire Water (YW) sample data sets from the Harrogate and Dales (H&D), Yorkshire, United Kingdom water supply network as part of Project NEPTUNE EP/E003192/1 ). A data analysissystem based on Kalman filtering and statistical approach has been developed. The system has been applied to the analysis of flow and pressure data. The system was proved for one dataset case and have shown the ability to detect anomalies in flow and pres sure patterns, by correlating with other information. It will be shown that the Kalman/statistical approach is a promising approach at detecting subtle changes and higher frequency features, it has the potential to identify precursor features and smaller l eaks and hence could be useful for monitoring the development of leaks, prior to a large volume burst event.

The concept of local explosion in freshwater ecosystems

2013 ◽  
Vol 25 (1-2) ◽  
pp. 136-148
Author(s):  
I. V. Gryb
Keyword(s):  
Species Composition ◽  
Aquatic Environment ◽  
Arid Zone ◽  
Fish Fauna ◽  
River Basins ◽  
Freshwater Ecosystems ◽  
Human Society ◽  
Living Matter ◽  
Ecosystem Recovery ◽  
Average Temperature

The concept of an explosion in freshwater ecosystems as a result of the release of accumulated energy, accompanied by the destruction of the steady climax successions of hydrocenoses is presented. The typification of local explosions as well as methods for assessing their risk during the development of river basins are shown. The change in atmospheric circulation, impaired phases of the hydrological regime of rivers, increasing the average temperature of the planet, including in Polesie to 0,6 ºC, deforestation leads to concentration and release of huge amounts of unmanaged terrestrial energy, which manifests itself in the form of disasters and emergencies. Hydroecological explosion is formed as a result of multifactorial external influence (natural and anthropogenic) on the water body in a certain period of time. Moreover, its level at wastewater discharge depends on the mass of recycled impurities and behaved processing capacity of the reservoir, and the mass of dumped on biocides and the possibility of the water flow to their dilution and to the utilization of non-toxic concentrations. In all these cases the preservation of "centers of life" in the tributaries of the first order – local fish reproduction areas contributed to ecosystem recovery, and the entire ecosystem has evolved from equilibrium to non-equilibrium with further restructuring after the explosion and environmental transition to a new trophic level. It means that hydroecological explosion can be researched as the logical course of development of living matter in abiotic environmental conditions, ending abruptly with the formation of new species composition cenoses and new bio-productivity. The buffer capacity of the water environment is reduced due to re-development and anthropic transformation of geobiocenoses of river basins, which leads to a weakening of life resistance. This applies particularly to the southern industrial regions of Ukraine, located in the arid zone that is even more relevant in the context of increased average temperature due to the greenhouse effect, as well as to Polesie (Western, Central and Chernihiv), had been exposed to large-scale drainage of 60-80th years, which contributed to the degradation of peatlands and fitostroma. Imposing the western trace of emissions from the Chernobyl accident to these areas had created the conditions of prolonged hydroecological explosion in an intense process of aging water bodies, especially lakes, change in species composition of fish fauna and the occurrence of neoplasms at the organismal level. Under these conditions, for the existence of man and the environment the vitaukta should be strengthened, i.e. buffer resistance and capacitance the aquatic environment, bioefficiency on the one hand and balanced using the energy deposited - on the other. This will restore the functioning of ecosystems "channel-floodplain", "riverbed-lake", reducing the energy load on the aquatic environment. Hydroecological explosions of natural origin can not be considered a pathology – it is a jump process of natural selection of species of biota. Another thing, if they are of anthropogenic origin and if the magnitude of such an impact is on the power of geological factors. Hydroecological explosions can be regarded as a manifestation of environmental wars that consciously or unconsciously, human society is waging against themselves and their kind in the river basins, so prevention of entropy increase in the aquatic environment and the prevention of hydroecological explosions is a matter of human survival. While the man - is not the final link in the development of living matter, it can develop without him, as matter is eternal, and the forms of its existence are different.

ANALISIS BAHAYA LONGSOR DI AREA RENCANA PEMBANGUNAN JALUR KERETA CEPAT JAKARTA-BANDUNG CK 88-CK 114 (Studi Kasus Kabupaten Bandung Barat)

2019 ◽  
Vol 3 ◽  
pp. 1071
Author(s):  
Fauzan Muzakki ◽  
Boedi Tjahjono ◽  
Dwi Putro Tedjo Baskoro
Keyword(s):  
Analytical Hierarchy Process ◽  
Multi Criteria Evaluation ◽  
Hierarchy Process

Mulai tahun 2015 hingga 2019 di Kabupaten Bandung Barat akan dibangun sebuah jalur kereta cepat Jakarta-Bandung. Padahal daerah tersebut cenderung bergunung dan berbukit sehingga berpeluang untuk longsor. Penelitian ini bertujuan untuk melakukan pemetaan bahaya longsor skala 1:25.000 berbasis peta sub-faset lahan (satuan lahan) skala 1:25.000 sebagai satuan pemetaan di CK 88-CK 114 (KM 88-KM 114). Metode penelitian ini mencakup intepretasi visual citra penginderaan jauh untuk pemetaan faset lahan, dan penggunaan lahan dan perhitungan MCE (Multi Criteria Evaluation) untuk penilaian bahaya longsor. Skor dan bobot dari setiap parameter longsor diperoleh dari pendapat para pakar bencana melalui analisis AHP (Analytical Hierarchy Process). Berdasarkan hasil analisis AHP dan MCE, parameter utama terjadinya longsor di lokasi penelitian adalah faktor geologi. Hasil penelitian juga menunjukkan bahwa lokasi penelitian didominasi oleh kelas bahaya longsor sedang seluas 42% dari total luas lokasi penelitian, sedangkan kelas bahaya longsor rendah dan tinggi secara berturut-turut seluas 28% dan 30%. Jika dilakukan perbandingan antara jumlah titik longsor terhadap luasan kelas bahaya longsor diperoleh nilai kerapatan kelas bahaya longsor tinggi hingga rendah secara berturut-turut terdapat pada kelas bahaya tinggi, sedang, dan rendah. Oleh karena itu, prediksi zona bahaya longsor yang dilakukan dalam penelitian ini dapat dikategorikan baik.

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