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There are diverse analyses that can be conducted backed on the above methodology. It can be used to prioritise the protection of regions in the water resources system; or to develop policy mechanisms like government ownership or control of land, government regulations, government incentive payments, and voluntary payments (Brauman et al., 2007). More simple but not less useful is the selection of alternatives (about land uses change, demands satisfaction, etc.) which accomplish the legislation and satisfy all the stakeholders, that maximise the WS. Another approach would be the optimisation of water treatment costs, through the maximisation of the self‐purification capacity of the river; or the maximisation of water resources availability analysing the influence of land uses on the different water cycle variables. Provided that sometimes data is uncertain, and more in the case of distant future, this kind of methodology presents an opportunity to test effects of uncertainty (Wainger et al., 2010). Then the possibilities that the linkage of IWRM and ES brings are very broad and will be demonstrated in future research. METHODOLOGY FOR WATER SERVICES ANALYSIS Water resources evaluation model EVALHID Water storage in aquifers System of Environmental‐ Economic Accounting for water Natural runoff Natural runoff 350 300 250 CABECERA CORNEJA STA TERESA 200 ALHANDIGA Hm3 ALMAR 150 VALMUZA TORMES_VALMUZA 100 ALMENDRA DESAGUE 50 Jul‐03 Jul‐04 Jan‐03 Jan‐04 Oct‐02 Apr‐03 Apr‐04 Oct‐03 Jul‐00 Jul‐01 Jul‐02 Jan‐01 Jan‐02 Apr‐01 Apr‐02 Oct‐01 Jul‐98 Jul‐99 Apr‐00 Oct‐00 Jan‐98 Jan‐99 Jan‐00 Apr‐98 Apr‐99 Oct‐98 Oct‐99 Jul‐95 Jul‐96 Jul‐97 Apr‐97 Oct‐97 Jan‐95 Jan‐96 Jan‐97 Oct‐94 Apr‐95 Apr‐96 Oct‐95 Oct‐96 Jul‐92 Jul‐93 Jul‐94 Apr‐94 Jan‐92 Jan‐93 Jan‐94 Apr‐92 Apr‐93 Oct‐92 Oct‐91 Freshwater production for economic uses Oct‐93 0 Water management model SIMGES Diffuse pollution evaluation model CARFU Volume in reservoirs Volumes in reservoirs Flows in rivers Flows in rivers Pollutants load to water bodies Pollutants load into water bodies 500.0 600 Water Footprint 16 450.0 14 500 400.0 12 350.0 400 ' "Rio t1";" r. Tormes 545_c";"Caudal"' 10 300.0 'Rio T3;" r. Tormes 504_c_g";"Caudal"' Hm3 300 '"Rio t1";" r. Tormes 503_a";"Caudal"' ' "Rio t1";" r. Tormes 546_a";"Caudal"' Hm 3 250.0 Sta Teresa 'Rio t1;" r. Tormes 504_a";"Caudal"' Ammonium Kg 8 Nitrates Villagonzalo 200.0 6 'Rio t1;" r. Tormes 502_b";"Caudal"' 200 Phosphorus 150.0 4 100.0 100 2 50.0 Jun‐04 Oct‐03 Apr‐04 Feb‐04 Dec‐03 Aug‐04 Jun‐02 Jun‐03 Oct‐02 Apr‐03 Feb‐03 Aug‐03 Oct‐01 Apr‐02 Dec‐02 Aug‐02 Feb‐02 Dec‐01 Aug‐01 Jun‐00 Jun‐01 Apr‐01 Oct‐99 Oct‐00 Apr‐00 Feb‐00 Dec‐99 Feb‐01 Dec‐00 Aug‐00 Jun‐98 Jun‐99 Oct‐98 Apr‐98 Apr‐99 Aug‐99 Feb‐98 Dec‐97 Feb‐99 Dec‐98 Aug‐98 Oct‐97 Aug‐97 Jun‐97 Oct‐96 Apr‐97 Feb‐97 Jul‐04 Jan‐04 Apr‐04 Jul‐01 Jul‐02 Jul‐03 Jan‐02 Jan‐03 Oct‐01 Oct‐02 Oct‐03 Apr‐01 Apr‐02 Apr‐03 Jul‐00 Jan‐01 Oct‐00 Jul‐99 Jul‐98 Jan‐00 Jan‐98 Jan‐99 Oct‐99 Oct‐97 Oct‐98 Apr‐00 Apr‐98 Apr‐99 Jul‐97 Apr‐97 Jul‐95 Jul‐96 Jan‐95 Jan‐96 Jan‐97 Oct‐95 Oct‐96 Apr‐95 Apr‐96 Jul‐92 Jul‐93 Jul‐94 Oct‐94 Jan‐92 Jan‐93 Jan‐94 Oct‐91 Oct‐92 Oct‐93 Apr‐92 Apr‐93 Habitat suitability model CAUDECO Dec‐96 0 0.0 Apr‐94 Jul‐03 Jul‐04 Jan‐04 Oct‐03 Apr‐03 Apr‐04 Jul‐00 Jul‐01 Jul‐02 Jan‐02 Jan‐03 Oct‐01 Oct‐02 Apr‐01 Apr‐02 Jul‐98 Jul‐99 Jan‐01 Oct‐00 Jan‐98 Jan‐99 Jan‐00 Oct‐97 Oct‐98 Oct‐99 Apr‐00 Apr‐98 Apr‐99 Jul‐95 Jul‐96 Jul‐97 Jan‐96 Jan‐97 Oct‐95 Oct‐96 Apr‐95 Apr‐96 Apr‐97 Jul‐92 Jul‐93 Jul‐94 Jan‐95 Oct‐94 Jan‐92 Jan‐93 Jan‐94 Oct‐91 Oct‐92 Oct‐93 Apr‐93 Apr‐92 Biodiversity in rivers Apr‐94 0 Water quality model GESCAL Water purification in rivers and lakes Scenario and trade‐off analysis for DECISION MAKING Figure 45. Diagram of the Methodology for Water Services Analysis. | Proposal for Ecosystem Services analysis 67