my publication is on "energy cost optimization in water supply system" which is currently in publication process in Pakistan development review.

in which one of my conclusion is that, by sucking water from deeper depth have higher quality of water. in this scene you may give strength to your point.

thank you...

Dear colleague I have an article  so I give you the abastract:

IBERO-AMERICAN PROGRAMME FOR SCIENCE, TECHNOLOGY AND DEVELOPMENT

IBERO-AMERICAN NETWORK OF BIOECONOMICS AND CLMATE CHANGE

Environmental Technical Inefficiency Effects on Estero Real quality water: A Nicaragua

Ariel José,  Aguilar[1]; Osorio Urtecho, Katherinne  Del Rosario[2]; Prado Olivares, Mariela del Socorro[3]; Carlos Alberto, Zúniga González[4]; Rafaela Dios, Palomares[5]; Pablo, Sierra Figueredo[6]

Abstract

At the present study was an empirical application in panel data for environmental stochastic frontier model to measure the Estero Real Nicaragua quality water (Dios Palomares, 2014).   The productive path of Bioeconomy where this approach was applied is the Biodiversity Resource Exploitation.   The study aim was to measure the level of environmental technical inefficiency over the body water of the Estero Real.  We used a frontier stochastic model that it considers the environmental condition with chemical and physic parameters and the planetary magnetic activity.  The environmental inefficiency effects were assumption to be an independent distribution as truncations of normal distributions with constant variance, but means which are a linear function of observable Sampling Point-speciflc variables.      The results show that environmental inefficiency effects are understandable by inelasticity solar activity (-2.53) that reduce the quality water in 89 %, it imply according to Lynch y Poole (1979) a regular quality.

JEL CLASSIFICATION: Q:20, Q:25, Q: 53, Q:57, Q:58

Keywords: Stochastic Frontier, Solar Activity, Environmental Technical Efficiency,  Aquatic Bioeconomy, Biodiversity, Quality  water, Data Panel.

[1] Universidad Nacional Autónoma de Nicaragua, León.  Centro de Investigación en Ciencias Agrarias y Economía Aplicada.  Laboratorio de Fisiología Animal.  Teléfono: 00 (505) 86238835. Email: [email protected] 

[2]Universidad Nacional Autónoma de Nicaragua, León.   Laboratorio de Fisiología Animal.  Teléfono: . Email:

[3]Universidad Nacional Autónoma de Nicaragua, León.   Laboratorio de Fisiología Animal.  Teléfono: . Email:

[4]Universidad Nacional Autónoma de Nicaragua, León.  Centro de Investigación en Ciencias Agrarias y Economía Aplicada.  Email: [email protected]   Teléfono: 00 (505) 84976448.

[5]Universidad de Córdoba.  Grupo de eficiencia y productividad de la Universidad de  Córdoba, España. Email: [email protected],  Teléfono: + 34 957 21 84 79.

[6] Instituto de Geofísica y Astronomía, AMA, CITMA.  Cuba.  Email: [email protected] Teléfono: 00 (537)2714331.