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==== Filtration of surface water by ecosystem types - Demand ====

<font 14px/inherit;;inherit;;inherit>**General description**</font>

<font 14px/inherit;;inherit;;inherit>The Water Filtration demand indicator describes the amount of nitrogen that is introduced into the ecosystem per municipality in kg/year. This includes the nitrogen emitted in the atmosphere and then deposed in the landscape and the nitrogen from the fertilization in agriculture.</font>

==== Input Data ====

  * <font 14px/inherit;;inherit;;inherit>NOx emissions in the atmosphere.</font>Source:[[http://www.ceip.at/new_emep-grid/01_grid_data_2015| EMEP, http://www.ceip.at/new_emep-grid/01_grid_data_2015]]
  * <font 14px/inherit;;inherit;;inherit>Nitrogen loads from fertilization per different LULC</font>
==== Calculation processes ====

<font 14px/inherit;;inherit;;inherit>**(1****)****Calculate N emissions per municipality **</font>

<font 14px/inherit;;inherit;;inherit>The Emep gridded data on NOx are used to calculate the average emissions at the LAU2 level, these data are after converted in N equivalent as described in Umweltbundesamt (2017)</font>

<font 14px/inherit;;inherit;;inherit>**(2****)****Calculate N inputs based on LULC**</font>

<font 14px/inherit;;inherit;;inherit>The N loads quantities per agricultural areas are based on literature (Bundesministerium für land- und forstwirtschaft, umwelt und wasserwirtschaft, 2017), the average N input per municipality is then calculated.</font>

|   \\  <font 14px/inherit;;black;;inherit>lucode</font>|   \\  <font 14px/inherit;;black;;inherit>Land use type</font>|   \\  <font 14px/inherit;;black;;inherit>N load</font>|
|   \\  <font 14px/inherit;;black;;inherit>110</font>|   \\  <font 14px/inherit;;black;;inherit>Urban fabric</font>|   \\  <font 14px/inherit;;black;;inherit>10</font>|
|   \\  <font 14px/inherit;;black;;inherit>120</font>|   \\  <font 14px/inherit;;black;;inherit>Industrial, commercial and transport units</font>|   \\  <font 14px/inherit;;black;;inherit>10</font>|
|   \\  <font 14px/inherit;;black;;inherit>130</font>|   \\  <font 14px/inherit;;black;;inherit>Mine, dump and construction sites</font>|   \\  <font 14px/inherit;;black;;inherit>10</font>|
|   \\  <font 14px/inherit;;black;;inherit>140</font>|   \\  <font 14px/inherit;;black;;inherit>Artificial, non-agricultural vegetated areas</font>|   \\  <font 14px/inherit;;black;;inherit>10</font>|
|   \\  <font 14px/inherit;;black;;inherit>210</font>|   \\  <font 14px/inherit;;black;;inherit>Arable land</font>|   \\  <font 14px/inherit;;black;;inherit>113</font>|
|   \\  <font 14px/inherit;;black;;inherit>220</font>|   \\  <font 14px/inherit;;black;;inherit>Permanent crops</font>|   \\  <font 14px/inherit;;black;;inherit>117</font>|
|   \\  <font 14px/inherit;;black;;inherit>230</font>|   \\  <font 14px/inherit;;black;;inherit>Pastures</font>|   \\  <font 14px/inherit;;black;;inherit>118</font>|
|   \\  <font 14px/inherit;;black;;inherit>240</font>|   \\  <font 14px/inherit;;black;;inherit>Heterogeneous agricultural areas</font>|   \\  <font 14px/inherit;;black;;inherit>104</font>|
|   \\  <font 14px/inherit;;black;;inherit>310</font>|   \\  <font 14px/inherit;;black;;inherit>Forests</font>|   \\  <font 14px/inherit;;black;;inherit>0</font>|
|   \\  <font 14px/inherit;;black;;inherit>320</font>|   \\  <font 14px/inherit;;black;;inherit>Scrub and/or herbaceous vegetation associations</font>|   \\  <font 14px/inherit;;black;;inherit>0</font>|
|   \\  <font 14px/inherit;;black;;inherit>330</font>|   \\  <font 14px/inherit;;black;;inherit>Open spaces with little or no vegetation</font>|   \\  <font 14px/inherit;;black;;inherit>0</font>|
|   \\  <font 14px/inherit;;black;;inherit>410</font>|   \\  <font 14px/inherit;;black;;inherit>Inland wetlands</font>|   \\  <font 14px/inherit;;black;;inherit>0</font>|
|   \\  <font 14px/inherit;;black;;inherit>420</font>|   \\  <font 14px/inherit;;black;;inherit>Maritime wetlands</font>|   \\  <font 14px/inherit;;black;;inherit>0</font>|
|   \\  <font 14px/inherit;;black;;inherit>510</font>|   \\  <font 14px/inherit;;black;;inherit>Inland waters</font>|   \\  <font 14px/inherit;;black;;inherit>0</font>|
|   \\  <font 14px/inherit;;black;;inherit>520</font>|   \\  <font 14px/inherit;;black;;inherit>Marine waters</font>|   \\  <font 14px/inherit;;black;;inherit>0</font>|

<font 14px/inherit;;inherit;;inherit>**(3) Calculate total N inputs**</font>

<font 14px/inherit;;inherit;;inherit>The total N inputs per municipality are therefore obtained summing up the results from point 1 and point 2.</font>

{{:en:20181807water_filtration_demand.jpg?nolink&392x500}}

{{:en:test_legens.jpg?nolink&500x297}}

<font 12px/inherit;;inherit;;inherit>Bibliography:</font>

Stickstoffoxid-Emissionen, Umwelt Bundesamt, 2017: [[https://www.umweltbundesamt.de/daten/luft/luftschadstoff-emissionen-in-deutschland/stickstoffoxid-emissionen#textpart-1|https://www.umweltbundesamt.de/daten/luft/luftschadstoff-emissionen-in-deutschland/stickstoffoxid-emissionen#textpart-1]]

Bundesministerium für land- und forstwirtschaft, umwelt und wasserwirtschaft, 2017, Richtlinie für die düngung im ackerbau und grünland. ([[https://www.ages.at/download/0/0/4bfee71413a6aa535d2e753fef27f17769bb2507/fileadmin/AGES2015/Service/Landwirtschaft/Boden_Datein/Broschueren/Richtlinien_fuer_die_sachgerechte_Duengung_im_Ackerbau_und_Gruenland_7_Auflage.pdf|https://www.ages.at/download/0/0/4bfee71413a6aa535d2e753fef27f17769bb2507/fileadmin/AGES2015/Service/Landwirtschaft/Boden_Datein/Broschueren/Richtlinien_fuer_die_sachgerechte_Duengung_im_Ackerbau_und_Gruenland_7_Auflage.pdf]])

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