Performance of Water Melon under Mulching, Subsurface and Surface Drip Irrigation Systems in Semi-Arid Region

Thirty-four percent (34.40%) of irrigation areas in Indonesia are under the authority of the central government, 17.89% under the authority of the provincial government and 47.71% are under the authority of the District/Municipality government. Various efforts have been made by the government to improve the performance of surface water irrigation systems that cover 78% of the total irrigation area, however, the performance did not improve significantly. One of the cause is due to the damage of national surface water canals that affect the performance of the irrigation system. The purpose of this study was to analyze the factors that influence the institutional performance of the irrigation system in the spatial dimension in the semi-arid region of Timor Island, East Nusa Tenggara. The spatial approach of the Geographically Weighted Regression (GWR) method was chosen as an alternative approach in the analysis of irrigation system performance because it considers the variability of hydrogeological characteristics and the performance of different irrigation systems in each irrigation area based on their authority. The results of this study indicated that the total cropping intensity had a significant effectand decreased the performance of the irrigation system. The higher rice productivity and the maintenance frequency of the main system (headworks and canals) would improve the performance of the irrigation system. Meanwhile, the lower damage rate of the main system would improve the performance of the irrigation system. Irrigation area under the authority of district/municipality had a lower/worse irrigation system performance than those under the authority of provincial and central governments.

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Spatial Dimensions of Irrigation System Performance Status in The Semi Arid Region of Timor Island, East Nusa Tenggara, Indonesia

International Journal of Social Science and Human Research ◽

10.47191/ijsshr/v4-i6-34 ◽

2021 ◽

Vol 04 (06) ◽

Author(s):

Ida Nurwiana ◽

Keyword(s):

Performance Index ◽

System Performance ◽

Arid Region ◽

Central Government ◽

Irrigation System ◽

Spatial Diversity ◽

Irrigation Systems ◽

The Status ◽

Semi Arid Region ◽

Semi Arid

One aspect that plays an important role in the performance of irrigation systems is the institutional division of irrigation areas' authority covering the authority of district/municipality, provincial and the central government. This study aimed to assess how the institutional division of irrigation areas' authority affect the performance of irrigation systems, to reclassifies the standard of performance index of irrigation systems, to analyze the status of irrigation system performance in 6 districts/municipalities in the semi arid region of Timor Island, East Nusa Tenggara based on their authority and mapping of spatial diversity. This study used descriptive statistical method through the performance index of irrigation systems in 6 districts/ municipalities. This study concluded that the status of the irrigation system performanceof 6 districts/municipalities in the semi arid region of Timor Island increased along with the level of irrigation systems' authority. The best Status of the performance of irrigation systems in 6 districts/municipalities was Malaka District Irrigation System, the performance tended to be better in the irrigation system under the authority of central government that administratively placed in one district/municipality (non cross district irrigation system). Based on the analysis of the status of irrigation system performance in 6 districts/municipalitiesin Timor Island, a specific step for each district/municipality to adjust the location characteristics with policies can be taken to overcome irrigation systems' problems in the semi arid regions of Timor Island.

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