Integration of RS, GIS and AHP for Hanoi Peri-Urban Agriculture Planning

Integration of RS, GIS and AHP for Hanoi Peri-Urban Agriculture Planning

Using the integrated result of AHP, RS and GIS techniques, the arable land suitability assessment map (figure 4.2) presents 502.18km2 (table 4.2) is unarable that covers the 54% land of the province. The unarable land category covers built-up, forest, unfertile soil, and water bodies. These areas cannot be used for agriculture purpose. From the peri-urban agriculture perspective, only 46% (426.23km2) land of the province is found as arable. While assessing suitable area for peri-urban agriculture in arable land, 32% (298.36km2), 12% (113.35km2) and 2% (14.52km2) area of the total land are found as Very Good, Good and Fair respectively. As compared to other peri-urban districts, the Soc Son and Dong Anh have bigger coverage of arable land. Within the arable land, the Tu Liem district, Gia Lam and Dong Anh have similar percentages of very good land. A big area (28%) of Soc Son district is found as good for peri-urban agriculture.

Figure-4.2: Suitable Land for peri-urban agriculture

Table 4.2: Land suitability assessment for peri-urban agriculture

District	Unarable		Fair		Good		Very Good		Total
Units	KM2	Percent	KM2	Percent	KM2	Percent	KM2	Percent
Dong Anh	90.31	48.62%	0.18	0.10%	15.28	8.23%	79.96	43.05%	185.73
Gia Lam	93.71	53.47%	0.02	0.01%	5.93	3.38%	75.60	43.13%	175.26
Soc Son	130.99	42.90%	14.26	4.67%	85.02	27.85%	75.03	24.57%	305.30
Thanh Tri	61.61	61.99%	0.04	0.04%	4.35	4.38%	33.39	33.59%	99.39
Tu Liem	42.45	53.34%	0.01	0.02% 2.76	3.46%	34.36		43.18%	79.58
Urban Area	83.11	99.96%	0.00	0.00%	0.00	0.00%	0.03	0.03%	83.14
Total Area	502.18	54.09%	14.52	1.56%	113.35	12.21%	298.36	32.14%	928.41

Unarable and arable land classification was performed within peri-urban districts at commune level. There are 127 communes in five peri-urban districts. The Gia Lam district has 35 communes where as Dong Anh, Soc Son, Thanh Tri and Tuliem have 24, 26, 26 and 16 communes respectively. The figure 4.3 shows that 15 communes (table 4.3) out of total 127 have above 75% areas of unarable land in each. There are 54 communes, which have area of unarable land between 50-75%. Similarly, 48 communes have 25-50% and 10 communes have less than 25% of unarable

Figure-4.3: Status of Unarable Land

Table 4.3: Commune level status of unarable land in peri-urban districts

District	Area in percentage/Number of Communes
Dong Anh	<25	50 – 75	25 – 50	>75	Total
Dong Anh	0	14	10	0	24
Gia Lam	0	14	13	8	35
Soc Son	10	11	5	0	26
Thanh Tri	0	4	16	6	26
Tu Liem	0	5	10	1	16
Total	10	48	54	15	127

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