.

1 files changed, 15 insertions, 15 deletions

diff --git a/assignment2/potential-effects.tex b/assignment2/potential-effects.tex
index c8557d2..e1b6e8a 100644
--- a/assignment2/potential-effects.tex
+++ b/assignment2/potential-effects.tex
@@ -138,6 +138,20 @@ warmer than the river water. If the planned factory has a comparable
 wastewater output, the water may have to be treated before discharge
 to avoid significant effects on the aquatic ecosystem.
 
+When organic components in dairy factory effluent reach rivers they
+are converted to carbon dioxide and water by bacteria under use of
+oxygen.  Whether the inflow of organic components leads to oxygen
+depletion with fatal consequences for fish and other members of
+aquatic communities depends on the re-aeriation characteristics of the
+river.
+
+According to the description, the river is already used as a sink for
+the wastewater of another dairy factory; dairy farming is said to have
+expanded in this area, indicating that the inflow of organic and
+inorganic components from farm effluent and non-point sources has also
+increased. Under these circumstances, the cumulative effects of
+wastewater discharge must be addressed.
+
 \subsection{Socio-economic effects}
 
 - workers during construction
@@ -147,23 +161,13 @@ to avoid significant effects on the aquatic ecosystem.
 - loss of vegetation + discharge of wastewater: less beautiful
 
 
+
 \section{SCRATCH AREA}
 
 
 from NIWA:
 http://www.niwa.co.nz/our-science/freshwater/tools/kaitiaki_tools/land-use/meat-processing/impacts/water-resources-and-MDP
 
-  - Changes in flow - changes in water levels and flow variability
-    alters available mahinga kai habitat and the invertebrates they
-    feed on.
-
-  - Reduction in specialist habitats - a decrease in water levels
-    reduces flow to riparian wetlands, backwaters, and intermittent
-    streams.
-
-  - Changes in sediment accumulation - flow reduction affects movement
-    and deposition of sediments in streams and rivers.
-
   - Decreases in species abundance and diversity - aquatic species
     have developed life history strategies in direct response to
     natural flows; for example, diadromous fish species migrate up and
@@ -186,9 +190,6 @@ http://www.niwa.co.nz/our-science/freshwater/tools/kaitiaki_tools/land-use/meat-
 \subsection{Cumulative impacts}
 
 
-- social impacts
-  - more jobs 
-
 - must consider cumulative impact of increased dairy *farming*
 - consider effects of existing factory with permits for another decade
 - farm runoffs pollute the river according to locals
@@ -213,7 +214,6 @@ impact of agriculture on water:
   - discharges from the soil and animals
   - materials move into surface and groundwater at higher rates than usual
 - discharge from animals increases E. coli concentrations
-- 
 
 
 monitoring / significance implications: