Salt ponds of Punjulharjo Village near Lasem, Java island, Indonesia, Southeast Asia, Asia

salt ponds salt harvesting punjulharjo village lasem java island indonesia southeast asia agriculture traditional methods coastal area sea salt worker rural life farming evaporation process salt production shallow pools salt flats landscape blue sky harvest season local economy water management ecosystem artisanal salt environmental practices community outdoor work nature industry summer bright sunlight salt crystallization saline water livelihood region farming techniques people heritage culture land use sustainable practices economic activity coastal communities tradition infrastructure rural agriculture cultivation labor