Housing Class based water consumption estimation model for craft villages with central and local water supply in Red River Delta (RRD) Dipl. -Geogr. S. Grothe, Dipl. -Ing. R. Emmerich 3/18/2018 1
Embedding of IWRM Nam Dinh BMBF funded German IWRM research projects in Vietnam 3/18/2018 2
IWRM Nam Dinh Project partners German partners University of Greifswald Fraunhofer Institute UMSICHT Iaks Gmb. H MOSKITO GIS Gmb. H Vietnamese partners Department of Science and Technology (Do. ST) Nam Dinh Institute of Geological Science (IGS) / VAST Peoples Committee of Nam Dinh province Peoples Committee of Nam Dinh City Peoples Committee of Yen Xa commune 3/18/2018 3
Planned technical facilities in Nam Dinh province 3/18/2018 4
IWRM Nam Dinh Development of a water consumption estimation model for rural craft villages in RRD Socio - geographical research in Tong Xa village, Yen Xa commune, Nam Dinh province 1) Classification of House Types (according to appearance) 2) Household survey to record data concerning (interviews in 320 households) 3) Statistical data processing 3/18/2018 5
House type classification in Tong Xa House type 1 3/18/2018 6
House type classification in Tong Xa House type 2 3/18/2018 7
House type classification in Tong Xa House type 3 3/18/2018 8
House type classification in Tong Xa House type 4 3/18/2018 9
House type classification in Tong Xa House type 5 3/18/2018 10
Cluster analysis Method, input data Hierarchical cluster analysis using Ward‘s method Squared euclidean distance measure Binary data input: Private tap Toilet with water flush Toilet in bathroom Individual households business Pig breeding Poor household (GSO poverty line 200, 000 VND per capita per month) Above average income (mean income 871, 920 VND per capita per month) 3/18/2018 11
Cluster analysis Results: Socio-economic Water User Types 3/18/2018 12
Cross-tabulation of rural and urban Water User Types and House Types 1 & 2 and 4 & 5 do not show significant differences according to Water User Types They are merged to Housing Classes A and C House Type 3 forms Housing Class B 3/18/2018 13
Cross-tabulation of rural and urban Water User Types and Housing Classes A, B and C show significant differences according to Water User Types Useful for water consumption estimation model development 3/18/2018 14
Water Consumption Estimation Model Housing Classes in Tong Xa village adopted to GSO and UN classification of living quarters A Semi-permanent building B Permanent building without all basic facilities C Permanent building with all basic facilities Phenological data record UN (2007). Principles and Recommendations for Population and Housing Censuses IPUMS Vietnam Project report (www. hist. umn. edu, download on 22. 01. 2008) 3/18/2018 15
Water Consumption Estimation Model Water source types in Tong Xa village I: exclusive tap water II: exclusive rain water / ground water III: tap and ground / rain water 3/18/2018 16
Water Consumption Estimation Model Mean water consumption per Housing Class and Water Source Type in Tong Xa village 3/18/2018 17
Water Consumption Estimation Model Example for Housing Class (HC) A in Tong Xa village Data input: Housing Class A: 130, Housing Class B: 147, Housing Class C: 43 3/18/2018 18
Water Consumption Estimation Model Results for 320 households in Tong Xa village 3/18/2018 19
Water Demand Estimation Model Discussion The standard figures fit well with the results for „only tap water“ user group (model: 24, 000 l/day; rural figure: 21, 000 l/day; urban figure: 32, 000 l/day) The standard figures are far below for „only GW/RW“ and „Tap water & GW/RW“ user groups The weakest point are the data for groundwater and rain water use Data record is based on anecdotic information or on request in given unit (m³) Data record of GW, RW demand has to be improved (installation of water clocks in some households during next stay in Tong Xa) 3/18/2018 20
Thank You for Your attention 3/18/2018 21
House classification by General Statistics Office (GSO) of Vietnam Adopted to UN classification of living quaters Simple house (Walls usually made of dirt/leaves/woven sheets, not built of bricks or wooden frame, roof of bamboo/leaf/oil-paper) Semi-permanent house (walls made of brick/wood frame and with roof made of tile/cement-mortar roofing/metal roofing etc. ) Permanent house (villas, multi-story houses, apartments of multi-storey buildings, multi-floor buildings assembled from pre-fabricated components, brickconstructed houses with flat concrete roof) IPUMS Vietnam Project report (www. hist. umn. edu (download on 22. 01. 2008) http: //www. gso. gov. vn (accessed on 22. 01. 2008) 3/18/2018 22
UN classification of living quaters UN (2007). Principles and Recommendations for Population and Housing Censuses 3/18/2018 23
Local Water Management Plans embedded in provincial level IWRM 3/18/2018 24
Water Demand Estimation Model Results The resulting water demand for 320 households a 5 people (1, 600 people) of Tong Xa village residential area is approximately: 319, 000 litre / day Results from standard figures are much smaller Rural area (80 litre / day / person) : 128, 000 litre / day Urban area (120 litre / day / person): 192, 000 litre / day Results not for whole residential area (only 320 households) 3/18/2018 25
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