Abstract:
Soil is a vital parameter for planting design in urban green spaces especially in adverse climate conditions. In this
study, the utilization of analytic hierarchy process (AHP) in surveying land suitability for urban green space from
measured criteria like suitability indices, including physical (i.e. clay, silt, sand, bulk density, penetration resistance),
chemical (i.e. electrical conductivity, sodium absorption ratio, organic matter, Olsen phosphorus, water soluble
potassium and DTPA-extractable of Fe, Zn, Cu, Mn) and heavy metal (i.e. total Ni, Cd and Pb) properties of soil and
topography attributes (i.e. slope degree) data were investigated. The subjective value judgment, in light of
questionnaire survey was utilized for pair-wise comparison after standard AHP method in a structure of four criteria
(suitability indices) alongside related sub-criteria (19 factors). AHP method and GIS techniques were combined to
create suitability map. The outcomes demonstrated that less than 8.86% of the all study region has no restriction and
34.54% has extreme restrictions for green space land use. The southern part of the riverside parks had higher
suitability, whereas the northern area had lower suitability. The real limiting variables include soil compaction, soil
salinity, and Zn deficiency; albeit direct mild accumulations were for lead in Ahvaz riverside parks. This study
delineates the efficacy of AHP and weighted overlay model for the soil suitability investigation of green space in the
study territory. In light of the outcomes, bulk density and organic matter are the most vital indices of soil in urban
green space.
Machine summary:
ir Desert 22-1 (2017) 117-133 Land suitability assessment for urban green space using AHP and GIS: A case study of Ahvaz parks, Iran Z.
Rangzana a Ramin Agriculture and Natural Resources University of Khozestan, Ahvaz, Iran b Soil and Water Research Institute(SWRI), Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran Received: 10 August 2016; Received in revised form: 20 March 2017; Accepted: 30 March 2017 Abstract Soil is a vital parameter for planting design in urban green spaces especially in adverse climate conditions.
In this study, the utilization of analytic hierarchy process (AHP) in surveying land suitability for urban green space from measured criteria like suitability indices, including physical (i.
In addition to waterlogging and salinity conditions, nutrient element, compression and soil compaction, lack of suitable aeration, climate constraints including low precipitation and very high temperatures in summer and high evaporation that have caused harsh conditions for common plant growth that make Khozestan’s green spaces lack suitable quality.
1. Soil physical suitability The descriptive statistical outline of the accessible information set for soil physical properties of western and eastern sides of Karun river is introduced in Tables 3 and 4, separately (clay, silt, sand, bulk density, and penetration resistance).
36% of the studied area has no soil salinity restriction for green spaces (Table 5).
Four items were selected for analysis of green space suitability of riverside parks including physical and chemical properties, heavy metal of soil and topography attributes.