While the presence of water on the surface of early Mars is now well known, the volume, distribution, duration, and timing of the liquid water have proven difficult to determine. This study makes use of a distinctive boxwork-rich sedimentary layer on Mount Sharp to map fluid-based cementation from orbital imagery and estimate the minimum volume of water present when this sedimentary interval wa...

[1] Because of transverse pore-scale dispersion, a mixing layer develops along the interface between a lighter fluid (fresh water) that flows toward a well or sink above a heavier fluid (seawater) in a steady axisymmetric configuration. The Peclet number characterizing mixing, Pe = L/aT, where L is the aquifer thickness and aT is transverse dispersivity, is generally much larger than unity. The...

A two-dimensional finite element model is proposed to simulate transient seepage for complex groundwater flow systems. The complete soil system is treated as a continuum encompassing flow in both saturated and unsaturated zones. In the unsaturated zone, the air phase is assumed to be continuous and open to atmospheric pressure. The coefficient of permeability of the unsaturated soil is assumed ...

Watersheds have different water compartments (surface, subsurface, and underground) connected by the soil-water interface. In order to be able relate these compartments, monitoring data are necessary, such as case of Ribeirão Concórdia watershed, in Lontras, Santa Catarina (SC). This study aimed evaluate behavior correlation between rainfall-runoff phreatic surface levels with chemical species ...

The use of ETBE (ethyl-tert-butylether) as gasoline additive has recently grown rapidly. Contamination of aquatic systems is well documented for MTBE (methyl-tert-butylether), but less for other gasoline additives. Due to their mobility they may easily reach drinking water collection areas. Odour and flavour thresholds of MTBE are known to be low, but for ETBE and TAME (methyl-tert-amylether) h...

Phreatic groundwater plays a significant role in the water supply for human communities, especially scarce regions. This research was conducted to investigate hydrochemistry and contamination of phreatic their constraints on drinking semiarid region North China Plain. A total 49 groundwaters were collected hydrochemical analysis. The results suggested had slightly alkaline nature. Although larg...

Studi yang dilakukan di daerah Desa Wakorumba, Kecamatan Wakorumba Selatan, Kabupaten Muna, Provinsi Sulawesi Tenggara, terletak koordinat 04º 58' 20'' - 55' 0'' LS dan 122º 50' -122º 52' BT. Tujuan studi mendasarkan pada analisis petrografi adalah untuk mengetahui jenis batugamping tipe diagenesis terjadi Formasi Wapulaka, Sampolakosa, Anggota Batugamping Tondo. Berdasarkan kenampakan fisik...

To use and manage water resources carry out protection measures from the destructive effect of flow, reservoir hydrosystem construction has greatly developed. The article presents results field studies to determine unsteady filtration in Earth-fill dam core. In research process, static data literature review, study data, theoretical processing were used. Numerical was carried with methods mathe...

Abstract. Monitoring the water movements in karstic areas is a fundamental but challenging task due to complexity of drainage system and difficulty deploying network observations. Gravimetry offers valid complement classical hydrologic measurements order characterize such systems which recharge process causes temporarily accumulation large volumes voids epi-phreatic system. We show an innovativ...

The coastal aquifers of the Mediterranean region are highly susceptible to seawater intrusion due a combination challenges such as land subsidence, high aquifer permeability, urbanization, drainage, and an unsustainable use water during dry summer months. present study is focused on statistical analysis groundwater data evaluate spatial changes level electrical conductivity in phreatic Emilia-R...